55580920 has 32 divisors (see below), whose sum is σ = 125309520. Its totient is φ = 22187520.

The previous prime is 55580887. The next prime is 55580927. The reversal of 55580920 is 2908555.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55580927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24640 + ... + 26800.

Almost surely, 2^55580920 is an apocalyptic number.

It is an amenable number.

55580920 is an abundant number, since it is smaller than the sum of its proper divisors (69728600).

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

55580920 is a wasteful number, since it uses less digits than its factorization.

55580920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2815 (or 2811 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 34.

The square root of 55580920 is about 7455.2612294942. The cubic root of 55580920 is about 381.6294754308.

The spelling of 55580920 in words is "fifty-five million, five hundred eighty thousand, nine hundred twenty".