28656359 has 4 divisors (see below), whose sum is σ = 29142120. Its totient is φ = 28170600.

The previous prime is 28656349. The next prime is 28656391. The reversal of 28656359 is 95365682.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28656359 - 2⁴ = 28656343 is a prime.

It is a super-2 number, since 2×28656359² = 1642373822273762, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28656319) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 242792 + ... + 242909.

It is an arithmetic number, because the mean of its divisors is an integer number (7285530).

Almost surely, 2^28656359 is an apocalyptic number.

28656359 is a deficient number, since it is larger than the sum of its proper divisors (485761).

28656359 is an equidigital number, since it uses as much as digits as its factorization.

28656359 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485760.

The product of its digits is 388800, while the sum is 44.

The square root of 28656359 is about 5353.1634572466. The cubic root of 28656359 is about 306.0133240670.

The spelling of 28656359 in words is "twenty-eight million, six hundred fifty-six thousand, three hundred fifty-nine".