55620288 has 84 divisors (see below), whose sum is σ = 162141408. Its totient is φ = 18224640.

The previous prime is 55620281. The next prime is 55620307. The reversal of 55620288 is 88202655.

55620288 is a `hidden beast` number, since 5 + 5 + 620 + 28 + 8 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (55620281) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34345 + ... + 35927.

Almost surely, 2^55620288 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 55620288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81070704).

55620288 is an abundant number, since it is smaller than the sum of its proper divisors (106521120).

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

55620288 is a wasteful number, since it uses less digits than its factorization.

55620288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1662 (or 1649 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 36.

The square root of 55620288 is about 7457.9010452003. The cubic root of 55620288 is about 381.7195569637.

The spelling of 55620288 in words is "fifty-five million, six hundred twenty thousand, two hundred eighty-eight".