28408256 has 14 divisors (see below), whose sum is σ = 56372760. Its totient is φ = 14204096.

The previous prime is 28408253. The next prime is 28408273. The reversal of 28408256 is 65280482.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28408253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221876 + ... + 222003.

Almost surely, 2^28408256 is an apocalyptic number.

It is an amenable number.

28408256 is a deficient number, since it is larger than the sum of its proper divisors (27964504).

28408256 is an equidigital number, since it uses as much as digits as its factorization.

28408256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443891 (or 443881 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 35.

The square root of 28408256 is about 5329.9395868996. The cubic root of 28408256 is about 305.1276219475.

The spelling of 28408256 in words is "twenty-eight million, four hundred eight thousand, two hundred fifty-six".