53191728 has 60 divisors (see below), whose sum is σ = 154387688. Its totient is φ = 17729280.

The previous prime is 53191717. The next prime is 53191739. The reversal of 53191728 is 82719135.

It is an interprime number because it is at equal distance from previous prime (53191717) and next prime (53191739).

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

It is a junction number, because it is equal to n+sod(n) for n = 53191692 and 53191701.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2953 + ... + 10728.

Almost surely, 2^53191728 is an apocalyptic number.

It is an amenable number.

53191728 is an abundant number, since it is smaller than the sum of its proper divisors (101195960).

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

53191728 is a wasteful number, since it uses less digits than its factorization.

53191728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13704 (or 13686 counting only the distinct ones).

The product of its digits is 15120, while the sum is 36.

The square root of 53191728 is about 7293.2659350938. The cubic root of 53191728 is about 376.0809769760.

The spelling of 53191728 in words is "fifty-three million, one hundred ninety-one thousand, seven hundred twenty-eight".