28256670 has 48 divisors (see below), whose sum is σ = 79121952. Its totient is φ = 6955200.

The previous prime is 28256663. The next prime is 28256677. The reversal of 28256670 is 7665282.

28256670 is a `hidden beast` number, since 28 + 2 + 566 + 70 = 666.

It is an interprime number because it is at equal distance from previous prime (28256663) and next prime (28256677).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28256677) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10906 + ... + 13245.

It is an arithmetic number, because the mean of its divisors is an integer number (1648374).

Almost surely, 2^28256670 is an apocalyptic number.

28256670 is an abundant number, since it is smaller than the sum of its proper divisors (50865282).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28256670 is a wasteful number, since it uses less digits than its factorization.

28256670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24177 (or 24174 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 28256670 is about 5315.7003301541. The cubic root of 28256670 is about 304.5839350581.

The spelling of 28256670 in words is "twenty-eight million, two hundred fifty-six thousand, six hundred seventy".