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29901143620 = 2253197749363
BaseRepresentation
bin11011110110001111…
…110011111001000100
32212011212021110220201
4123312033303321010
5442214143043440
621423021140244
72105656345555
oct336617637104
985155243821
1029901143620
1111754463847
1259659ba684
132a86a61cba
14163927432c
15ba00ed19a
hex6f63f3e44

29901143620 has 48 divisors (see below), whose sum is σ = 64885621248. Its totient is φ = 11562554880.

The previous prime is 29901143603. The next prime is 29901143621. The reversal of 29901143620 is 2634110992.

It is a self number, because there is not a number n which added to its sum of digits gives 29901143620.

It is not an unprimeable number, because it can be changed into a prime (29901143621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 581059 + ... + 630421.

It is an arithmetic number, because the mean of its divisors is an integer number (1351783776).

Almost surely, 229901143620 is an apocalyptic number.

29901143620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 29901143620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32442810624).

29901143620 is an abundant number, since it is smaller than the sum of its proper divisors (34984477628).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

29901143620 is a wasteful number, since it uses less digits than its factorization.

29901143620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50380 (or 50378 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 37.

The spelling of 29901143620 in words is "twenty-nine billion, nine hundred one million, one hundred forty-three thousand, six hundred twenty".

Divisors: 1 2 4 5 10 20 31 62 124 155 310 620 977 1954 3908 4885 9770 19540 30287 49363 60574 98726 121148 151435 197452 246815 302870 493630 605740 987260 1530253 3060506 6121012 7651265 15302530 30605060 48227651 96455302 192910604 241138255 482276510 964553020 1495057181 2990114362 5980228724 7475285905 14950571810 29901143620