55630720 has 32 divisors (see below), whose sum is σ = 132993720. Its totient is φ = 22252032.

The previous prime is 55630717. The next prime is 55630723. The reversal of 55630720 is 2703655.

It is an interprime number because it is at equal distance from previous prime (55630717) and next prime (55630723).

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55630723) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 42822 + ... + 44101.

Almost surely, 2^55630720 is an apocalyptic number.

It is an amenable number.

55630720 is an abundant number, since it is smaller than the sum of its proper divisors (77363000).

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

55630720 is an equidigital number, since it uses as much as digits as its factorization.

55630720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86942 (or 86930 counting only the distinct ones).

The product of its (nonzero) digits is 6300, while the sum is 28.

The square root of 55630720 is about 7458.6004049017. The cubic root of 55630720 is about 381.7434202555.

The spelling of 55630720 in words is "fifty-five million, six hundred thirty thousand, seven hundred twenty".