55683720 has 128 divisors (see below), whose sum is σ = 189734400. Its totient is φ = 14519808.

The previous prime is 55683709. The next prime is 55683731. The reversal of 55683720 is 2738655.

55683720 is a `hidden beast` number, since 556 + 83 + 7 + 20 = 666.

It is an interprime number because it is at equal distance from previous prime (55683709) and next prime (55683731).

It is a Harshad number since it is a multiple of its sum of digits (36).

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 31 ways as a sum of consecutive naturals, for example, 50212 + ... + 51308.

It is an arithmetic number, because the mean of its divisors is an integer number (1482300).

Almost surely, 2^55683720 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 55683720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94867200).

55683720 is an abundant number, since it is smaller than the sum of its proper divisors (134050680).

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

55683720 is a wasteful number, since it uses less digits than its factorization.

55683720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1164 (or 1154 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 55683720 is about 7462.1525044722. The cubic root of 55683720 is about 381.8646121644.

The spelling of 55683720 in words is "fifty-five million, six hundred eighty-three thousand, seven hundred twenty".