53908404 has 72 divisors (see below), whose sum is σ = 139784064. Its totient is φ = 16156800.

The previous prime is 53908397. The next prime is 53908427. The reversal of 53908404 is 40480935.

It is a super-2 number, since 2×53908404² = 5812232043654432, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 198789 + ... + 199059.

Almost surely, 2^53908404 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 53908404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69892032).

53908404 is an abundant number, since it is smaller than the sum of its proper divisors (85875660).

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

53908404 is a wasteful number, since it uses less digits than its factorization.

53908404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437 (or 424 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 53908404 is about 7342.2342648543. The cubic root of 53908404 is about 377.7624834126.

The spelling of 53908404 in words is "fifty-three million, nine hundred eight thousand, four hundred four".