55723320 has 48 divisors (see below), whose sum is σ = 181101960. Its totient is φ = 14859456.

The previous prime is 55723303. The next prime is 55723397. The reversal of 55723320 is 2332755.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 77034 + ... + 77753.

Almost surely, 2^55723320 is an apocalyptic number.

It is an amenable number.

55723320 is an abundant number, since it is smaller than the sum of its proper divisors (125378640).

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

55723320 is a wasteful number, since it uses less digits than its factorization.

55723320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154804 (or 154797 counting only the distinct ones).

The product of its (nonzero) digits is 6300, while the sum is 27.

The square root of 55723320 is about 7464.8054227823. The cubic root of 55723320 is about 381.9551129151.

The spelling of 55723320 in words is "fifty-five million, seven hundred twenty-three thousand, three hundred twenty".