53404400 has 60 divisors (see below), whose sum is σ = 146640912. Its totient is φ = 18309120.

The previous prime is 53404397. The next prime is 53404423. The reversal of 53404400 is 440435.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

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, 6737 + ... + 12336.

Almost surely, 2^53404400 is an apocalyptic number.

53404400 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

53404400 is an abundant number, since it is smaller than the sum of its proper divisors (93236512).

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

53404400 is a wasteful number, since it uses less digits than its factorization.

53404400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19098 (or 19087 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 53404400 is about 7307.8314156800. The cubic root of 53404400 is about 376.5815280812.

Adding to 53404400 its reverse (440435), we get a palindrome (53844835).

The spelling of 53404400 in words is "fifty-three million, four hundred four thousand, four hundred".