28856907 has 12 divisors (see below), whose sum is σ = 42699384. Its totient is φ = 18768480.

The previous prime is 28856903. The next prime is 28856917. The reversal of 28856907 is 70965882.

28856907 is a `hidden beast` number, since 2 + 88 + 569 + 0 + 7 = 666.

It is not a de Polignac number, because 28856907 - 2² = 28856903 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28856903) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38733 + ... + 39470.

It is an arithmetic number, because the mean of its divisors is an integer number (3558282).

Almost surely, 2^28856907 is an apocalyptic number.

28856907 is a deficient number, since it is larger than the sum of its proper divisors (13842477).

28856907 is a wasteful number, since it uses less digits than its factorization.

28856907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78250 (or 78247 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 28856907 is about 5371.8625261635. The cubic root of 28856907 is about 306.7255307347.

The spelling of 28856907 in words is "twenty-eight million, eight hundred fifty-six thousand, nine hundred seven".