56730618 has 80 divisors (see below), whose sum is σ = 152982720. Its totient is φ = 15349824.

The previous prime is 56730601. The next prime is 56730623. The reversal of 56730618 is 81603765.

56730618 is a `hidden beast` number, since 5 + 6 + 7 + 30 + 618 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 20230 + ... + 22862.

It is an arithmetic number, because the mean of its divisors is an integer number (1912284).

Almost surely, 2^56730618 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56730618, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76491360).

56730618 is an abundant number, since it is smaller than the sum of its proper divisors (96252102).

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

56730618 is a wasteful number, since it uses less digits than its factorization.

56730618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2673 (or 2664 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 56730618 is about 7531.9730482789. The cubic root of 56730618 is about 384.2428883277.

The spelling of 56730618 in words is "fifty-six million, seven hundred thirty thousand, six hundred eighteen".