28608757 has 4 divisors (see below), whose sum is σ = 29852640. Its totient is φ = 27364876.

The previous prime is 28608731. The next prime is 28608779. The reversal of 28608757 is 75780682.

It is a happy number.

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 28608757 - 2²³ = 20220149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28608707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 621907 + ... + 621952.

It is an arithmetic number, because the mean of its divisors is an integer number (7463160).

Almost surely, 2^28608757 is an apocalyptic number.

It is an amenable number.

28608757 is a deficient number, since it is larger than the sum of its proper divisors (1243883).

28608757 is a wasteful number, since it uses less digits than its factorization.

28608757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1243882.

The product of its (nonzero) digits is 188160, while the sum is 43.

The square root of 28608757 is about 5348.7154532654. The cubic root of 28608757 is about 305.8437872983.

The spelling of 28608757 in words is "twenty-eight million, six hundred eight thousand, seven hundred fifty-seven".