53405420 has 24 divisors (see below), whose sum is σ = 112336224. Its totient is φ = 21326976.

The previous prime is 53405399. The next prime is 53405459. The reversal of 53405420 is 2450435.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12704 + ... + 16376.

It is an arithmetic number, because the mean of its divisors is an integer number (4680676).

Almost surely, 2^53405420 is an apocalyptic number.

It is an amenable number.

53405420 is an abundant number, since it is smaller than the sum of its proper divisors (58930804).

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

53405420 is a wasteful number, since it uses less digits than its factorization.

53405420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4409 (or 4407 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 23.

The square root of 53405420 is about 7307.9012034920. The cubic root of 53405420 is about 376.5839255785.

Adding to 53405420 its reverse (2450435), we get a palindrome (55855855).

The spelling of 53405420 in words is "fifty-three million, four hundred five thousand, four hundred twenty".