53640688 has 20 divisors (see below), whose sum is σ = 104270608. Its totient is φ = 26732160.

The previous prime is 53640637. The next prime is 53640689. The reversal of 53640688 is 88604635.

It is a super-2 number, since 2×53640688² = 5754646818226688, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 53640688.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53640689) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 348 + ... + 10363.

Almost surely, 2^53640688 is an apocalyptic number.

It is an amenable number.

53640688 is a deficient number, since it is larger than the sum of its proper divisors (50629920).

53640688 is a wasteful number, since it uses less digits than its factorization.

53640688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11032 (or 11026 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 40.

The square root of 53640688 is about 7323.9803385864. The cubic root of 53640688 is about 377.1361065082.

The spelling of 53640688 in words is "fifty-three million, six hundred forty thousand, six hundred eighty-eight".