56859990 has 64 divisors (see below), whose sum is σ = 151725312. Its totient is φ = 13520000.

The previous prime is 56859977. The next prime is 56860003. The reversal of 56859990 is 9995865.

It is an interprime number because it is at equal distance from previous prime (56859977) and next prime (56860003).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15865 + ... + 19115.

It is an arithmetic number, because the mean of its divisors is an integer number (2370708).

Almost surely, 2^56859990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56859990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75862656).

56859990 is an abundant number, since it is smaller than the sum of its proper divisors (94865322).

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

56859990 is a wasteful number, since it uses less digits than its factorization.

56859990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3325.

The product of its (nonzero) digits is 874800, while the sum is 51.

The square root of 56859990 is about 7540.5563455225. The cubic root of 56859990 is about 384.5347503065.

The spelling of 56859990 in words is "fifty-six million, eight hundred fifty-nine thousand, nine hundred ninety".