55772480 has 28 divisors (see below), whose sum is σ = 132808980. Its totient is φ = 22308864.

The previous prime is 55772477. The next prime is 55772501. The reversal of 55772480 is 8427755.

It can be written as a sum of positive squares in 2 ways, for example, as 42406144 + 13366336 = 6512^2 + 3656^2 .

It is a super-2 number, since 2×55772480² = 6221139050700800, which contains 22 as substring.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86825 + ... + 87464.

Almost surely, 2^55772480 is an apocalyptic number.

It is an amenable number.

55772480 is an abundant number, since it is smaller than the sum of its proper divisors (77036500).

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

55772480 is a wasteful number, since it uses less digits than its factorization.

55772480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174306 (or 174296 counting only the distinct ones).

The product of its (nonzero) digits is 78400, while the sum is 38.

The square root of 55772480 is about 7468.0974819562. The cubic root of 55772480 is about 382.0674021942.

It can be divided in two parts, 557 and 72480, that added together give a palindrome (73037).

The spelling of 55772480 in words is "fifty-five million, seven hundred seventy-two thousand, four hundred eighty".