28830657 has 16 divisors (see below), whose sum is σ = 42845760. Its totient is φ = 17137152.

The previous prime is 28830653. The next prime is 28830671. The reversal of 28830657 is 75603882.

It is not a de Polignac number, because 28830657 - 2² = 28830653 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28830653) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13908 + ... + 15845.

It is an arithmetic number, because the mean of its divisors is an integer number (2677860).

Almost surely, 2^28830657 is an apocalyptic number.

It is an amenable number.

28830657 is a deficient number, since it is larger than the sum of its proper divisors (14015103).

28830657 is a wasteful number, since it uses less digits than its factorization.

28830657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29792.

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 28830657 is about 5369.4186836193. The cubic root of 28830657 is about 306.6324971118.

The spelling of 28830657 in words is "twenty-eight million, eight hundred thirty thousand, six hundred fifty-seven".