28812807 has 16 divisors (see below), whose sum is σ = 45197280. Its totient is φ = 18078336.

The previous prime is 28812799. The next prime is 28812821. The reversal of 28812807 is 70821882.

It is not a de Polignac number, because 28812807 - 2³ = 28812799 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28812877) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30928 + ... + 31845.

It is an arithmetic number, because the mean of its divisors is an integer number (2824830).

Almost surely, 2^28812807 is an apocalyptic number.

28812807 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

28812807 is a deficient number, since it is larger than the sum of its proper divisors (16384473).

28812807 is a wasteful number, since it uses less digits than its factorization.

28812807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62799 (or 62793 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 36.

The square root of 28812807 is about 5367.7562351508. The cubic root of 28812807 is about 306.5692019876.

The spelling of 28812807 in words is "twenty-eight million, eight hundred twelve thousand, eight hundred seven".