55497904 has 80 divisors (see below), whose sum is σ = 135634176. Its totient is φ = 21369600.

The previous prime is 55497899. The next prime is 55497947. The reversal of 55497904 is 40979455.

It is a happy number.

55497904 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 131614 + ... + 132034.

Almost surely, 2^55497904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55497904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67817088).

55497904 is an abundant number, since it is smaller than the sum of its proper divisors (80136272).

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

55497904 is a wasteful number, since it uses less digits than its factorization.

55497904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 554 (or 548 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 43.

The square root of 55497904 is about 7449.6915372383. The cubic root of 55497904 is about 381.4393793883.

The spelling of 55497904 in words is "fifty-five million, four hundred ninety-seven thousand, nine hundred four".