53004400 has 30 divisors (see below), whose sum is σ = 127344032. Its totient is φ = 21201600.

The previous prime is 53004311. The next prime is 53004401. The reversal of 53004400 is 440035.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53004401) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 65856 + ... + 66655.

Almost surely, 2^53004400 is an apocalyptic number.

53004400 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

53004400 is an abundant number, since it is smaller than the sum of its proper divisors (74339632).

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

53004400 is a wasteful number, since it uses less digits than its factorization.

53004400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132529 (or 132518 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 16.

The square root of 53004400 is about 7280.4120762495. The cubic root of 53004400 is about 375.6389698875.

Adding to 53004400 its reverse (440035), we get a palindrome (53444435).

The spelling of 53004400 in words is "fifty-three million, four thousand, four hundred".