55408864 has 96 divisors (see below), whose sum is σ = 134507520. Its totient is φ = 21938688.

The previous prime is 55408861. The next prime is 55408867. The reversal of 55408864 is 46880455.

55408864 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (55408861) and next prime (55408867).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55408861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 199894 + ... + 200170.

It is an arithmetic number, because the mean of its divisors is an integer number (1401120).

Almost surely, 2^55408864 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 55408864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67253760).

55408864 is an abundant number, since it is smaller than the sum of its proper divisors (79098656).

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

55408864 is a wasteful number, since it uses less digits than its factorization.

55408864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360 (or 352 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 40.

The square root of 55408864 is about 7443.7130519654. The cubic root of 55408864 is about 381.2352783351.

The spelling of 55408864 in words is "fifty-five million, four hundred eight thousand, eight hundred sixty-four".