55480920 has 96 divisors (see below), whose sum is σ = 182997360. Its totient is φ = 13446400.

The previous prime is 55480883. The next prime is 55480933. The reversal of 55480920 is 2908455.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12610 + ... + 16430.

Almost surely, 2^55480920 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 55480920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91498680).

55480920 is an abundant number, since it is smaller than the sum of its proper divisors (127516440).

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

55480920 is a wasteful number, since it uses less digits than its factorization.

55480920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3857 (or 3842 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 33.

The square root of 55480920 is about 7448.5515370440. The cubic root of 55480920 is about 381.4004648413.

The spelling of 55480920 in words is "fifty-five million, four hundred eighty thousand, nine hundred twenty".