55732320 has 384 divisors, whose sum is σ = 237081600. Its totient is φ = 11943936.

The previous prime is 55732319. The next prime is 55732337. The reversal of 55732320 is 2323755.

55732320 = T₂₁₆ + T₂₁₇ + ... + T₇₀₀.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 574512 + ... + 574608.

It is an arithmetic number, because the mean of its divisors is an integer number (617400).

Almost surely, 2^55732320 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55732320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (118540800).

55732320 is an abundant number, since it is smaller than the sum of its proper divisors (181349280).

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

55732320 is a wasteful number, since it uses less digits than its factorization.

55732320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147 (or 133 counting only the distinct ones).

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

The square root of 55732320 is about 7465.4082272840. The cubic root of 55732320 is about 381.9756752874.

The spelling of 55732320 in words is "fifty-five million, seven hundred thirty-two thousand, three hundred twenty".