56161590 has 32 divisors (see below), whose sum is σ = 135241056. Its totient is φ = 14926080.

The previous prime is 56161583. The next prime is 56161627. The reversal of 56161590 is 9516165.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6400 + ... + 12380.

It is an arithmetic number, because the mean of its divisors is an integer number (4226283).

Almost surely, 2^56161590 is an apocalyptic number.

56161590 is an abundant number, since it is smaller than the sum of its proper divisors (79079466).

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

56161590 is a wasteful number, since it uses less digits than its factorization.

56161590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6304.

The product of its (nonzero) digits is 8100, while the sum is 33.

The square root of 56161590 is about 7494.1036822291. The cubic root of 56161590 is about 382.9538719224.

The spelling of 56161590 in words is "fifty-six million, one hundred sixty-one thousand, five hundred ninety".