52728444 has 36 divisors (see below), whose sum is σ = 133549416. Its totient is φ = 17541408.

The previous prime is 52728391. The next prime is 52728451. The reversal of 52728444 is 44482725.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×52728444² = 5560577613322272, which contains 22 as substring.

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 = 52728399 and 52728408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22387 + ... + 24629.

It is an arithmetic number, because the mean of its divisors is an integer number (3709706).

Almost surely, 2^52728444 is an apocalyptic number.

It is an amenable number.

52728444 is an abundant number, since it is smaller than the sum of its proper divisors (80820972).

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

52728444 is a wasteful number, since it uses less digits than its factorization.

52728444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2906 (or 2901 counting only the distinct ones).

The product of its digits is 71680, while the sum is 36.

The square root of 52728444 is about 7261.4353952920. The cubic root of 52728444 is about 374.9859408062.

The spelling of 52728444 in words is "fifty-two million, seven hundred twenty-eight thousand, four hundred forty-four".