53928987 has 16 divisors (see below), whose sum is σ = 82282752. Its totient is φ = 30777120.

The previous prime is 53928983. The next prime is 53928989. The reversal of 53928987 is 78982935.

It is not a de Polignac number, because 53928987 - 2² = 53928983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (53928983) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25812 + ... + 27822.

It is an arithmetic number, because the mean of its divisors is an integer number (5142672).

Almost surely, 2^53928987 is an apocalyptic number.

53928987 is a deficient number, since it is larger than the sum of its proper divisors (28353765).

53928987 is a wasteful number, since it uses less digits than its factorization.

53928987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3298.

The product of its digits is 1088640, while the sum is 51.

The square root of 53928987 is about 7343.6358161336. The cubic root of 53928987 is about 377.8105556687.

The spelling of 53928987 in words is "fifty-three million, nine hundred twenty-eight thousand, nine hundred eighty-seven".