56772220 has 12 divisors (see below), whose sum is σ = 119221704. Its totient is φ = 22708880.

The previous prime is 56772161. The next prime is 56772223. The reversal of 56772220 is 2227765.

56772220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56772223) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1419286 + ... + 1419325.

It is an arithmetic number, because the mean of its divisors is an integer number (9935142).

Almost surely, 2^56772220 is an apocalyptic number.

It is an amenable number.

56772220 is an abundant number, since it is smaller than the sum of its proper divisors (62449484).

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

56772220 is a wasteful number, since it uses less digits than its factorization.

56772220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2838620 (or 2838618 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 31.

The square root of 56772220 is about 7534.7342355255. The cubic root of 56772220 is about 384.3367903940.

Adding to 56772220 its reverse (2227765), we get a palindrome (58999985).

The spelling of 56772220 in words is "fifty-six million, seven hundred seventy-two thousand, two hundred twenty".