55440636 has 24 divisors (see below), whose sum is σ = 132115200. Its totient is φ = 18086832.

The previous prime is 55440611. The next prime is 55440647. The reversal of 55440636 is 63604455.

It is a junction number, because it is equal to n+sod(n) for n = 55440597 and 55440606.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48586 + ... + 49713.

It is an arithmetic number, because the mean of its divisors is an integer number (5504800).

Almost surely, 2^55440636 is an apocalyptic number.

It is an amenable number.

55440636 is an abundant number, since it is smaller than the sum of its proper divisors (76674564).

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

55440636 is a wasteful number, since it uses less digits than its factorization.

55440636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98353 (or 98351 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 33.

The square root of 55440636 is about 7445.8468960891. The cubic root of 55440636 is about 381.3081324596.

The spelling of 55440636 in words is "fifty-five million, four hundred forty thousand, six hundred thirty-six".