52581728 has 12 divisors (see below), whose sum is σ = 103520340. Its totient is φ = 26290848.

The previous prime is 52581719. The next prime is 52581743. The reversal of 52581728 is 82718525.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 52581691 and 52581700.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 821558 + ... + 821621.

It is an arithmetic number, because the mean of its divisors is an integer number (8626695).

Almost surely, 2^52581728 is an apocalyptic number.

It is an amenable number.

52581728 is a deficient number, since it is larger than the sum of its proper divisors (50938612).

52581728 is a wasteful number, since it uses less digits than its factorization.

52581728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1643189 (or 1643181 counting only the distinct ones).

The product of its digits is 44800, while the sum is 38.

The square root of 52581728 is about 7251.3259477147. The cubic root of 52581728 is about 374.6378203892.

The spelling of 52581728 in words is "fifty-two million, five hundred eighty-one thousand, seven hundred twenty-eight".