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1228739652 = 2233719131653
BaseRepresentation
bin100100100111101…
…0001010001000100
310011122002102221000
41021033101101010
510004024132102
6321532053300
742310054230
oct11117212104
93148072830
101228739652
11580656318
122a3604230
131677478aa
14b92915c0
1572d1601c
hex493d1444

1228739652 has 192 divisors, whose sum is σ = 3867494400. Its totient is φ = 329546880.

The previous prime is 1228739641. The next prime is 1228739683. The reversal of 1228739652 is 2569378221.

It is a super-2 number, since 2×12287396522 = 3019602264794162208, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1228739598 and 1228739607.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1881358 + ... + 1882010.

It is an arithmetic number, because the mean of its divisors is an integer number (20143200).

Almost surely, 21228739652 is an apocalyptic number.

1228739652 is a gapful number since it is divisible by the number (12) 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 1228739652, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1933747200).

1228739652 is an abundant number, since it is smaller than the sum of its proper divisors (2638754748).

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

1228739652 is a wasteful number, since it uses less digits than its factorization.

1228739652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 823 (or 815 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 1228739652 is about 35053.3828895301. The cubic root of 1228739652 is about 1071.0751855824.

The spelling of 1228739652 in words is "one billion, two hundred twenty-eight million, seven hundred thirty-nine thousand, six hundred fifty-two".