55630836 has 36 divisors (see below), whose sum is σ = 146738592. Its totient is φ = 17737104.

The previous prime is 55630831. The next prime is 55630849. The reversal of 55630836 is 63803655.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a self number, because there is not a number n which added to its sum of digits gives 55630836.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55630831) 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, 32766 + ... + 34421.

It is an arithmetic number, because the mean of its divisors is an integer number (4076072).

Almost surely, 2^55630836 is an apocalyptic number.

It is an amenable number.

55630836 is an abundant number, since it is smaller than the sum of its proper divisors (91107756).

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

55630836 is a wasteful number, since it uses less digits than its factorization.

55630836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67220 (or 67215 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The square root of 55630836 is about 7458.6081811555. The cubic root of 55630836 is about 381.7436855897.

The spelling of 55630836 in words is "fifty-five million, six hundred thirty thousand, eight hundred thirty-six".