53291388 has 24 divisors (see below), whose sum is σ = 124472320. Its totient is φ = 17745840.

The previous prime is 53291377. The next prime is 53291389. The reversal of 53291388 is 88319235.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53291389) 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, 16143 + ... + 19161.

Almost surely, 2^53291388 is an apocalyptic number.

It is an amenable number.

53291388 is an abundant number, since it is smaller than the sum of its proper divisors (71180932).

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

53291388 is a wasteful number, since it uses less digits than its factorization.

53291388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4497 (or 4495 counting only the distinct ones).

The product of its digits is 51840, while the sum is 39.

The square root of 53291388 is about 7300.0950678741. The cubic root of 53291388 is about 376.3157054965.

The spelling of 53291388 in words is "fifty-three million, two hundred ninety-one thousand, three hundred eighty-eight".