52728657 has 4 divisors (see below), whose sum is σ = 70304880. Its totient is φ = 35152436.

The previous prime is 52728653. The next prime is 52728691. The reversal of 52728657 is 75682725.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 52728657 - 2² = 52728653 is a prime.

It is a super-2 number, since 2×52728657² = 5560622538047298, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (52728653) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 8788107 + ... + 8788112.

It is an arithmetic number, because the mean of its divisors is an integer number (17576220).

Almost surely, 2^52728657 is an apocalyptic number.

It is an amenable number.

52728657 is a deficient number, since it is larger than the sum of its proper divisors (17576223).

52728657 is a wasteful number, since it uses less digits than its factorization.

52728657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17576222.

The product of its digits is 235200, while the sum is 42.

The square root of 52728657 is about 7261.4500617990. The cubic root of 52728657 is about 374.9864457323.

The spelling of 52728657 in words is "fifty-two million, seven hundred twenty-eight thousand, six hundred fifty-seven".