156213940 has 12 divisors (see below), whose sum is σ = 328049316. Its totient is φ = 62485568.

The previous prime is 156213919. The next prime is 156213989. The reversal of 156213940 is 49312651.

156213940 is digitally balanced in base 2, 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 2 ways, for example, as 84235684 + 71978256 = 9178^2 + 8484^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3905329 + ... + 3905368.

It is an arithmetic number, because the mean of its divisors is an integer number (27337443).

Almost surely, 2^156213940 is an apocalyptic number.

156213940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

156213940 is an abundant number, since it is smaller than the sum of its proper divisors (171835376).

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

156213940 is a wasteful number, since it uses less digits than its factorization.

156213940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7810706 (or 7810704 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 156213940 is about 12498.5575167697. The cubic root of 156213940 is about 538.5672352322.

The spelling of 156213940 in words is "one hundred fifty-six million, two hundred thirteen thousand, nine hundred forty".