56305620 has 72 divisors (see below), whose sum is σ = 195197184. Its totient is φ = 12869568.

The previous prime is 56305603. The next prime is 56305621. The reversal of 56305620 is 2650365.

56305620 is a `hidden beast` number, since 5 + 6 + 30 + 5 + 620 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56305621) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21084 + ... + 23603.

It is an arithmetic number, because the mean of its divisors is an integer number (2711072).

Almost surely, 2^56305620 is an apocalyptic number.

It is an amenable number.

56305620 is an abundant number, since it is smaller than the sum of its proper divisors (138891564).

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

56305620 is a wasteful number, since it uses less digits than its factorization.

56305620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44709 (or 44704 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

The square root of 56305620 is about 7503.7070838353. The cubic root of 56305620 is about 383.2809623896.

Adding to 56305620 its reverse (2650365), we get a palindrome (58955985).

The spelling of 56305620 in words is "fifty-six million, three hundred five thousand, six hundred twenty".