55540980 has 72 divisors (see below), whose sum is σ = 183796704. Its totient is φ = 13464000.

The previous prime is 55540967. The next prime is 55540997. The reversal of 55540980 is 8904555.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12046 + ... + 16005.

It is an arithmetic number, because the mean of its divisors is an integer number (2552732).

Almost surely, 2^55540980 is an apocalyptic number.

It is an amenable number.

55540980 is an abundant number, since it is smaller than the sum of its proper divisors (128255724).

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

55540980 is a wasteful number, since it uses less digits than its factorization.

55540980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28077 (or 28072 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 36.

The square root of 55540980 is about 7452.5821028688. The cubic root of 55540980 is about 381.5380415737.

The spelling of 55540980 in words is "fifty-five million, five hundred forty thousand, nine hundred eighty".