53999720 has 16 divisors (see below), whose sum is σ = 121499460. Its totient is φ = 21599872.

The previous prime is 53999713. The next prime is 53999741. The reversal of 53999720 is 2799935.

It can be written as a sum of positive squares in 2 ways, for example, as 53027524 + 972196 = 7282^2 + 986^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 674957 + ... + 675036.

Almost surely, 2^53999720 is an apocalyptic number.

It is an amenable number.

53999720 is an abundant number, since it is smaller than the sum of its proper divisors (67499740).

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

53999720 is a wasteful number, since it uses less digits than its factorization.

53999720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1350004 (or 1350000 counting only the distinct ones).

The product of its (nonzero) digits is 153090, while the sum is 44.

The square root of 53999720 is about 7348.4501767379. The cubic root of 53999720 is about 377.9756616749.

The spelling of 53999720 in words is "fifty-three million, nine hundred ninety-nine thousand, seven hundred twenty".