55394880 has 112 divisors (see below), whose sum is σ = 185196480. Its totient is φ = 13989888.

The previous prime is 55394851. The next prime is 55394903. The reversal of 55394880 is 8849355.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16722 + ... + 19758.

It is an arithmetic number, because the mean of its divisors is an integer number (1653540).

Almost surely, 2^55394880 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 55394880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92598240).

55394880 is an abundant number, since it is smaller than the sum of its proper divisors (129801600).

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

55394880 is a wasteful number, since it uses less digits than its factorization.

55394880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3076 (or 3066 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 42.

The square root of 55394880 is about 7442.7736765268. The cubic root of 55394880 is about 381.2032037878.

The spelling of 55394880 in words is "fifty-five million, three hundred ninety-four thousand, eight hundred eighty".