156976640 has 80 divisors (see below), whose sum is σ = 398626272. Its totient is φ = 59080704.

The previous prime is 156976627. The next prime is 156976643. The reversal of 156976640 is 46679651.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 156976591 and 156976600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156976643) 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, 41717 + ... + 45323.

Almost surely, 2^156976640 is an apocalyptic number.

156976640 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 156976640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (199313136).

156976640 is an abundant number, since it is smaller than the sum of its proper divisors (241649632).

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

156976640 is an equidigital number, since it uses as much as digits as its factorization.

156976640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3647 (or 3631 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 44.

The square root of 156976640 is about 12529.0318859838. The cubic root of 156976640 is about 539.4423140505.

The spelling of 156976640 in words is "one hundred fifty-six million, nine hundred seventy-six thousand, six hundred forty".