53404624 has 80 divisors (see below), whose sum is σ = 130463872. Its totient is φ = 20611584.

The previous prime is 53404621. The next prime is 53404627. The reversal of 53404624 is 42640435.

It is an interprime number because it is at equal distance from previous prime (53404621) and next prime (53404627).

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 53404592 and 53404601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53404621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62182 + ... + 63034.

Almost surely, 2^53404624 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 53404624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65231936).

53404624 is an abundant number, since it is smaller than the sum of its proper divisors (77059248).

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

53404624 is a wasteful number, since it uses less digits than its factorization.

53404624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 924 (or 918 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 28.

The square root of 53404624 is about 7307.8467416880. The cubic root of 53404624 is about 376.5820545931.

The spelling of 53404624 in words is "fifty-three million, four hundred four thousand, six hundred twenty-four".