53728961 has 12 divisors (see below), whose sum is σ = 63602196. Its totient is φ = 45085920.

The previous prime is 53728937. The next prime is 53728981. The reversal of 53728961 is 16982735.

It can be written as a sum of positive squares in 2 ways, for example, as 23961025 + 29767936 = 4895^2 + 5456^2 .

It is not a de Polignac number, because 53728961 - 2¹⁴ = 53712577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53728981) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15506 + ... + 18651.

It is an arithmetic number, because the mean of its divisors is an integer number (5300183).

Almost surely, 2^53728961 is an apocalyptic number.

It is an amenable number.

53728961 is a deficient number, since it is larger than the sum of its proper divisors (9873235).

53728961 is a wasteful number, since it uses less digits than its factorization.

53728961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34192 (or 34181 counting only the distinct ones).

The product of its digits is 90720, while the sum is 41.

The square root of 53728961 is about 7330.0041609811. The cubic root of 53728961 is about 377.3428692715.

The spelling of 53728961 in words is "fifty-three million, seven hundred twenty-eight thousand, nine hundred sixty-one".