55392880 has 40 divisors (see below), whose sum is σ = 130911264. Its totient is φ = 21792000.

The previous prime is 55392863. The next prime is 55392881. The reversal of 55392880 is 8829355.

55392880 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55392881) 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 7 ways as a sum of consecutive naturals, for example, 796 + ... + 10555.

Almost surely, 2^55392880 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 55392880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65455632).

55392880 is an abundant number, since it is smaller than the sum of its proper divisors (75518384).

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

55392880 is a wasteful number, since it uses less digits than its factorization.

55392880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11425 (or 11419 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 40.

The square root of 55392880 is about 7442.6393168015. The cubic root of 55392880 is about 381.1986160257.

The spelling of 55392880 in words is "fifty-five million, three hundred ninety-two thousand, eight hundred eighty".