56855490 has 32 divisors (see below), whose sum is σ = 137712960. Its totient is φ = 15021504.

The previous prime is 56855459. The next prime is 56855501. The reversal of 56855490 is 9455865.

56855490 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5424 + ... + 11963.

It is an arithmetic number, because the mean of its divisors is an integer number (4303530).

Almost surely, 2^56855490 is an apocalyptic number.

56855490 is an abundant number, since it is smaller than the sum of its proper divisors (80857470).

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

56855490 is a wasteful number, since it uses less digits than its factorization.

56855490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17506.

The product of its (nonzero) digits is 216000, while the sum is 42.

The square root of 56855490 is about 7540.2579531472. The cubic root of 56855490 is about 384.5246057859.

It can be divided in two parts, 5685 and 5490, that added together give a triangular number (11175 = T₁₄₉).

The spelling of 56855490 in words is "fifty-six million, eight hundred fifty-five thousand, four hundred ninety".