53303688 has 24 divisors (see below), whose sum is σ = 144364350. Its totient is φ = 17767872.

The previous prime is 53303681. The next prime is 53303689. The reversal of 53303688 is 88630335.

It can be written as a sum of positive squares in only one way, i.e., 28323684 + 24980004 = 5322^2 + 4998^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (53303681) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 370093 + ... + 370236.

Almost surely, 2^53303688 is an apocalyptic number.

It is an amenable number.

53303688 is an abundant number, since it is smaller than the sum of its proper divisors (91060662).

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

53303688 is a wasteful number, since it uses less digits than its factorization.

53303688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 740341 (or 740334 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 53303688 is about 7300.9374740508. The cubic root of 53303688 is about 376.3446553093.

The spelling of 53303688 in words is "fifty-three million, three hundred three thousand, six hundred eighty-eight".