55320636 has 24 divisors (see below), whose sum is σ = 147521920. Its totient is φ = 15805872.

The previous prime is 55320623. The next prime is 55320653. The reversal of 55320636 is 63602355.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 329206 + ... + 329373.

Almost surely, 2^55320636 is an apocalyptic number.

It is an amenable number.

55320636 is an abundant number, since it is smaller than the sum of its proper divisors (92201284).

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

55320636 is a wasteful number, since it uses less digits than its factorization.

55320636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 658593 (or 658591 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 30.

The square root of 55320636 is about 7437.7843475056. The cubic root of 55320636 is about 381.0328227935.

The spelling of 55320636 in words is "fifty-five million, three hundred twenty thousand, six hundred thirty-six".