54991804 has 48 divisors (see below), whose sum is σ = 121540608. Its totient is φ = 21212928.

The previous prime is 54991777. The next prime is 54991813. The reversal of 54991804 is 40819945.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8437 + ... + 13459.

It is an arithmetic number, because the mean of its divisors is an integer number (2532096).

Almost surely, 2^54991804 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 54991804, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60770304).

54991804 is an abundant number, since it is smaller than the sum of its proper divisors (66548804).

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

54991804 is a wasteful number, since it uses less digits than its factorization.

54991804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5074 (or 5072 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 54991804 is about 7415.6458923010. The cubic root of 54991804 is about 380.2763548357.

The spelling of 54991804 in words is "fifty-four million, nine hundred ninety-one thousand, eight hundred four".