55127280 has 80 divisors (see below), whose sum is σ = 184050720. Its totient is φ = 13569024.

The previous prime is 55127279. The next prime is 55127309. The reversal of 55127280 is 8272155.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

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, 5715 + ... + 11954.

It is an arithmetic number, because the mean of its divisors is an integer number (2300634).

Almost surely, 2^55127280 is an apocalyptic number.

It is an amenable number.

55127280 is an abundant number, since it is smaller than the sum of its proper divisors (128923440).

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

55127280 is a wasteful number, since it uses less digits than its factorization.

55127280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17698 (or 17692 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 30.

The square root of 55127280 is about 7424.7747440579. The cubic root of 55127280 is about 380.5883775205.

The spelling of 55127280 in words is "fifty-five million, one hundred twenty-seven thousand, two hundred eighty".