55596990 has 32 divisors (see below), whose sum is σ = 133708320. Its totient is φ = 14795264.

The previous prime is 55596971. The next prime is 55596991. The reversal of 55596990 is 9969555.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55596991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15442 + ... + 18698.

It is an arithmetic number, because the mean of its divisors is an integer number (4178385).

Almost surely, 2^55596990 is an apocalyptic number.

55596990 is an abundant number, since it is smaller than the sum of its proper divisors (78111330).

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

55596990 is a wasteful number, since it uses less digits than its factorization.

55596990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3836.

The product of its (nonzero) digits is 546750, while the sum is 48.

The square root of 55596990 is about 7456.3389139711. The cubic root of 55596990 is about 381.6662518085. Note that the first 3 decimals are identical.

The spelling of 55596990 in words is "fifty-five million, five hundred ninety-six thousand, nine hundred ninety".