156145728 has 56 divisors (see below), whose sum is σ = 422765728. Its totient is φ = 50835456.

The previous prime is 156145727. The next prime is 156145733. The reversal of 156145728 is 827541651.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156145721) 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, 1201 + ... + 17712.

It is an arithmetic number, because the mean of its divisors is an integer number (7549388).

Almost surely, 2^156145728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 156145728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (211382864).

156145728 is an abundant number, since it is smaller than the sum of its proper divisors (266620000).

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

156145728 is a wasteful number, since it uses less digits than its factorization.

156145728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18971 (or 18961 counting only the distinct ones).

The product of its digits is 67200, while the sum is 39.

The square root of 156145728 is about 12495.8284239181. The cubic root of 156145728 is about 538.4888339988.

The spelling of 156145728 in words is "one hundred fifty-six million, one hundred forty-five thousand, seven hundred twenty-eight".