55490436 has 36 divisors (see below), whose sum is σ = 140540400. Its totient is φ = 18460848.

The previous prime is 55490429. The next prime is 55490441. The reversal of 55490436 is 63409455.

It is a happy number.

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 55490436.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22555 + ... + 24893.

It is an arithmetic number, because the mean of its divisors is an integer number (3903900).

Almost surely, 2^55490436 is an apocalyptic number.

It is an amenable number.

55490436 is an abundant number, since it is smaller than the sum of its proper divisors (85049964).

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

55490436 is a wasteful number, since it uses less digits than its factorization.

55490436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3008 (or 3003 counting only the distinct ones).

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

The square root of 55490436 is about 7449.1902915686. The cubic root of 55490436 is about 381.4222693304.

The spelling of 55490436 in words is "fifty-five million, four hundred ninety thousand, four hundred thirty-six".