28907874 has 32 divisors (see below), whose sum is σ = 64520640. Its totient is φ = 9593856.

The previous prime is 28907861. The next prime is 28907891. The reversal of 28907874 is 47870982.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12837 + ... + 14919.

It is an arithmetic number, because the mean of its divisors is an integer number (2016270).

Almost surely, 2^28907874 is an apocalyptic number.

28907874 is an abundant number, since it is smaller than the sum of its proper divisors (35612766).

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

28907874 is a wasteful number, since it uses less digits than its factorization.

28907874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2351 (or 2345 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 45.

The square root of 28907874 is about 5376.6043187127. The cubic root of 28907874 is about 306.9060038251.

The spelling of 28907874 in words is "twenty-eight million, nine hundred seven thousand, eight hundred seventy-four".