56709138 has 16 divisors (see below), whose sum is σ = 115278336. Its totient is φ = 18593040.

The previous prime is 56709113. The next prime is 56709139. The reversal of 56709138 is 83190765.

It is a junction number, because it is equal to n+sod(n) for n = 56709096 and 56709105.

It is not an unprimeable number, because it can be changed into a prime (56709139) 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, 77106 + ... + 77837.

It is an arithmetic number, because the mean of its divisors is an integer number (7204896).

Almost surely, 2^56709138 is an apocalyptic number.

56709138 is an abundant number, since it is smaller than the sum of its proper divisors (58569198).

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

56709138 is a wasteful number, since it uses less digits than its factorization.

56709138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155009.

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 56709138 is about 7530.5469920850. The cubic root of 56709138 is about 384.1943867164.

The spelling of 56709138 in words is "fifty-six million, seven hundred nine thousand, one hundred thirty-eight".