55878280 has 32 divisors (see below), whose sum is σ = 127324800. Its totient is φ = 22067136.

The previous prime is 55878233. The next prime is 55878281. The reversal of 55878280 is 8287855.

It is not an unprimeable number, because it can be changed into a prime (55878281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5682 + ... + 12001.

It is an arithmetic number, because the mean of its divisors is an integer number (3978900).

Almost surely, 2^55878280 is an apocalyptic number.

It is an amenable number.

55878280 is an abundant number, since it is smaller than the sum of its proper divisors (71446520).

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

55878280 is a wasteful number, since it uses less digits than its factorization.

55878280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17773 (or 17769 counting only the distinct ones).

The product of its (nonzero) digits is 179200, while the sum is 43.

The square root of 55878280 is about 7475.1775898637. The cubic root of 55878280 is about 382.3088426412.

The spelling of 55878280 in words is "fifty-five million, eight hundred seventy-eight thousand, two hundred eighty".