53330640 has 80 divisors (see below), whose sum is σ = 180363456. Its totient is φ = 12928000.

The previous prime is 53330617. The next prime is 53330657. The reversal of 53330640 is 4603335.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 53330640.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7461 + ... + 12740.

Almost surely, 2^53330640 is an apocalyptic number.

It is an amenable number.

53330640 is an abundant number, since it is smaller than the sum of its proper divisors (127032816).

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

53330640 is a wasteful number, since it uses less digits than its factorization.

53330640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20228 (or 20222 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 24.

The square root of 53330640 is about 7302.7830311464. The cubic root of 53330640 is about 376.4080751365.

Adding to 53330640 its reverse (4603335), we get a palindrome (57933975).

The spelling of 53330640 in words is "fifty-three million, three hundred thirty thousand, six hundred forty".