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142990580 = 22519376291
BaseRepresentation
bin10001000010111…
…01110011110100
3100222001200012102
420201131303310
5243101144310
622104441232
73354254105
oct1041356364
9328050172
10142990580
1173794a37
123ba79218
1323816615
1414dc23ac
15c8478a5
hex885dcf4

142990580 has 24 divisors (see below), whose sum is σ = 316085280. Its totient is φ = 54185760.

The previous prime is 142990559. The next prime is 142990583. The reversal of 142990580 is 85099241.

142990580 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142990583) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 187766 + ... + 188525.

It is an arithmetic number, because the mean of its divisors is an integer number (13170220).

Almost surely, 2142990580 is an apocalyptic number.

142990580 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

142990580 is an abundant number, since it is smaller than the sum of its proper divisors (173094700).

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

142990580 is a wasteful number, since it uses less digits than its factorization.

142990580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376319 (or 376317 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 142990580 is about 11957.8668666280. The cubic root of 142990580 is about 522.9206703573.

The spelling of 142990580 in words is "one hundred forty-two million, nine hundred ninety thousand, five hundred eighty".

Divisors: 1 2 4 5 10 19 20 38 76 95 190 380 376291 752582 1505164 1881455 3762910 7149529 7525820 14299058 28598116 35747645 71495290 142990580