56985890 has 32 divisors (see below), whose sum is σ = 111234816. Its totient is φ = 20894400.

The previous prime is 56985869. The next prime is 56985923. The reversal of 56985890 is 9858965.

It is a happy number.

It is an alternating number because its digits alternate between odd and even.

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, 18179 + ... + 21081.

It is an arithmetic number, because the mean of its divisors is an integer number (3476088).

Almost surely, 2^56985890 is an apocalyptic number.

56985890 is a deficient number, since it is larger than the sum of its proper divisors (54248926).

56985890 is a wasteful number, since it uses less digits than its factorization.

56985890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3074.

The product of its (nonzero) digits is 777600, while the sum is 50.

The square root of 56985890 is about 7548.8999198559. The cubic root of 56985890 is about 384.8183547462.

It can be divided in two parts, 56985 and 890, that added together give a palindrome (57875).

The spelling of 56985890 in words is "fifty-six million, nine hundred eighty-five thousand, eight hundred ninety".