54491904 has 108 divisors (see below), whose sum is σ = 159910296. Its totient is φ = 17842176.

The previous prime is 54491903. The next prime is 54491917. The reversal of 54491904 is 40919445.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (54491903) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 154192 + ... + 154544.

Almost surely, 2^54491904 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 54491904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79955148).

54491904 is an abundant number, since it is smaller than the sum of its proper divisors (105418392).

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

54491904 is a wasteful number, since it uses less digits than its factorization.

54491904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442 (or 425 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 54491904 is about 7381.8631794419. The cubic root of 54491904 is about 379.1205516405.

The spelling of 54491904 in words is "fifty-four million, four hundred ninety-one thousand, nine hundred four".