28807902 has 24 divisors (see below), whose sum is σ = 62772840. Its totient is φ = 9547920.

The previous prime is 28807859. The next prime is 28807907. The reversal of 28807902 is 20970882.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28807907) 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, 1249 + ... + 7692.

It is an arithmetic number, because the mean of its divisors is an integer number (2615535).

Almost surely, 2^28807902 is an apocalyptic number.

28807902 is an abundant number, since it is smaller than the sum of its proper divisors (33964938).

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

28807902 is a wasteful number, since it uses less digits than its factorization.

28807902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9128 (or 9125 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 28807902 is about 5367.2993208876. The cubic root of 28807902 is about 306.5518045473.

The spelling of 28807902 in words is "twenty-eight million, eight hundred seven thousand, nine hundred two".