56720618 has 16 divisors (see below), whose sum is σ = 86079840. Its totient is φ = 28029456.

The previous prime is 56720611. The next prime is 56720627. The reversal of 56720618 is 81602765.

It is not an unprimeable number, because it can be changed into a prime (56720611) 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, 103421 + ... + 103967.

It is an arithmetic number, because the mean of its divisors is an integer number (5379990).

Almost surely, 2^56720618 is an apocalyptic number.

56720618 is a deficient number, since it is larger than the sum of its proper divisors (29359222).

56720618 is a wasteful number, since it uses less digits than its factorization.

56720618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1061.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 56720618 is about 7531.3091823401. The cubic root of 56720618 is about 384.2203099575.

The spelling of 56720618 in words is "fifty-six million, seven hundred twenty thousand, six hundred eighteen".