156944640 has 144 divisors (see below), whose sum is σ = 523329408. Its totient is φ = 40009728.

The previous prime is 156944621. The next prime is 156944651. The reversal of 156944640 is 46449651.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87432 + ... + 89208.

It is an arithmetic number, because the mean of its divisors is an integer number (3634232).

Almost surely, 2^156944640 is an apocalyptic number.

156944640 is a gapful number since it is divisible by the number (10) 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 156944640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (261664704).

156944640 is an abundant number, since it is smaller than the sum of its proper divisors (366384768).

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

156944640 is a wasteful number, since it uses less digits than its factorization.

156944640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1824 (or 1810 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 39.

The square root of 156944640 is about 12527.7547868722. The cubic root of 156944640 is about 539.4056560969.

The spelling of 156944640 in words is "one hundred fifty-six million, nine hundred forty-four thousand, six hundred forty".