55990080 has 84 divisors (see below), whose sum is σ = 192592452. Its totient is φ = 14929920.

The previous prime is 55990069. The next prime is 55990087. The reversal of 55990080 is 8009955.

It can be written as a sum of positive squares in 2 ways, for example, as 16451136 + 39538944 = 4056^2 + 6288^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55990087) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6841 + ... + 12600.

Almost surely, 2^55990080 is an apocalyptic number.

It is an amenable number.

55990080 is an abundant number, since it is smaller than the sum of its proper divisors (136602372).

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

55990080 is a wasteful number, since it uses less digits than its factorization.

55990080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19464 (or 19451 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 36.

The square root of 55990080 is about 7482.6519363124. The cubic root of 55990080 is about 382.5636444141.

The spelling of 55990080 in words is "fifty-five million, nine hundred ninety thousand, eighty".