28657456 has 10 divisors (see below), whose sum is σ = 55523852. Its totient is φ = 14328720.

The previous prime is 28657439. The next prime is 28657457. The reversal of 28657456 is 65475682.

It is not an unprimeable number, because it can be changed into a prime (28657457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 895530 + ... + 895561.

Almost surely, 2^28657456 is an apocalyptic number.

It is an amenable number.

28657456 is a deficient number, since it is larger than the sum of its proper divisors (26866396).

28657456 is a wasteful number, since it uses less digits than its factorization.

28657456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1791099 (or 1791093 counting only the distinct ones).

The product of its digits is 403200, while the sum is 43.

The square root of 28657456 is about 5353.2659190442. The cubic root of 28657456 is about 306.0172288703.

The spelling of 28657456 in words is "twenty-eight million, six hundred fifty-seven thousand, four hundred fifty-six".