28407292785 has 96 divisors (see below), whose sum is σ = 51801120000. Its totient is φ = 14768303616.

The previous prime is 28407292769. The next prime is 28407292799. The reversal of 28407292785 is 58729270482.

28407292785 is a `hidden beast` number, since 284 + 0 + 7 + 292 + 78 + 5 = 666.

It is not a de Polignac number, because 28407292785 - 2⁴ = 28407292769 is a prime.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 142750116 + ... + 142750314.

It is an arithmetic number, because the mean of its divisors is an integer number (539595000).

Almost surely, 2^28407292785 is an apocalyptic number.

It is an amenable number.

28407292785 is a deficient number, since it is larger than the sum of its proper divisors (23393827215).

28407292785 is a wasteful number, since it uses less digits than its factorization.

28407292785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 520 (or 405 counting only the distinct ones).

The product of its (nonzero) digits is 4515840, while the sum is 54.

The spelling of 28407292785 in words is "twenty-eight billion, four hundred seven million, two hundred ninety-two thousand, seven hundred eighty-five".