156717940 has 24 divisors (see below), whose sum is σ = 338004072. Its totient is φ = 60992640.

The previous prime is 156717937. The next prime is 156717941. The reversal of 156717940 is 49717651.

156717940 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 32216976 + 124500964 = 5676^2 + 11158^2 .

It is a junction number, because it is equal to n+sod(n) for n = 156717893 and 156717902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156717941) 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, 105151 + ... + 106630.

It is an arithmetic number, because the mean of its divisors is an integer number (14083503).

Almost surely, 2^156717940 is an apocalyptic number.

156717940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

156717940 is an abundant number, since it is smaller than the sum of its proper divisors (181286132).

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

156717940 is a wasteful number, since it uses less digits than its factorization.

156717940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211827 (or 211825 counting only the distinct ones).

The product of its (nonzero) digits is 52920, while the sum is 40.

The square root of 156717940 is about 12518.7036070034. The cubic root of 156717940 is about 539.1458146071.

The spelling of 156717940 in words is "one hundred fifty-six million, seven hundred seventeen thousand, nine hundred forty".