156397728 has 48 divisors (see below), whose sum is σ = 423795456. Its totient is φ = 50449920.

The previous prime is 156397699. The next prime is 156397729. The reversal of 156397728 is 827793651.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (156397729) 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, 23301 + ... + 29252.

It is an arithmetic number, because the mean of its divisors is an integer number (8829072).

Almost surely, 2^156397728 is an apocalyptic number.

It is an amenable number.

156397728 is an abundant number, since it is smaller than the sum of its proper divisors (267397728).

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

156397728 is a wasteful number, since it uses less digits than its factorization.

156397728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52597 (or 52589 counting only the distinct ones).

The product of its digits is 635040, while the sum is 48.

The square root of 156397728 is about 12505.9077239519. The cubic root of 156397728 is about 538.7783632155.

The spelling of 156397728 in words is "one hundred fifty-six million, three hundred ninety-seven thousand, seven hundred twenty-eight".