156338640 has 80 divisors (see below), whose sum is σ = 538507200. Its totient is φ = 41689728.

The previous prime is 156338629. The next prime is 156338701. The reversal of 156338640 is 46833651.

156338640 is a `hidden beast` number, since 1 + 5 + 6 + 3 + 3 + 8 + 640 = 666.

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

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 156338595 and 156338604.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34030 + ... + 38349.

It is an arithmetic number, because the mean of its divisors is an integer number (6731340).

Almost surely, 2^156338640 is an apocalyptic number.

156338640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

156338640 is an abundant number, since it is smaller than the sum of its proper divisors (382168560).

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

156338640 is a wasteful number, since it uses less digits than its factorization.

156338640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72401 (or 72389 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 156338640 is about 12503.5450972914. The cubic root of 156338640 is about 538.7105034361.

The spelling of 156338640 in words is "one hundred fifty-six million, three hundred thirty-eight thousand, six hundred forty".