53403320 has 32 divisors (see below), whose sum is σ = 123091920. Its totient is φ = 20839680.

The previous prime is 53403299. The next prime is 53403323. The reversal of 53403320 is 2330435.

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

It is a junction number, because it is equal to n+sod(n) for n = 53403292 and 53403301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53403323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14642 + ... + 17921.

Almost surely, 2^53403320 is an apocalyptic number.

It is an amenable number.

53403320 is an abundant number, since it is smaller than the sum of its proper divisors (69688600).

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

53403320 is a wasteful number, since it uses less digits than its factorization.

53403320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32615 (or 32611 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 20.

The square root of 53403320 is about 7307.7575219762. The cubic root of 53403320 is about 376.5789895214.

Adding to 53403320 its reverse (2330435), we get a palindrome (55733755).

The spelling of 53403320 in words is "fifty-three million, four hundred three thousand, three hundred twenty".