28825875765 has 48 divisors (see below), whose sum is σ = 50269293360. Its totient is φ = 15280373760.

The previous prime is 28825875761. The next prime is 28825875773. The reversal of 28825875765 is 56757852882.

It is a happy number.

28825875765 is a `hidden beast` number, since 2 + 8 + 8 + 2 + 58 + 7 + 576 + 5 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 2116184004 + 26709691761 = 46002^2 + 163431^2 .

It is not a de Polignac number, because 28825875765 - 2² = 28825875761 is a prime.

It is a super-2 number, since 2×28825875765² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28825875761) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6718741 + ... + 6723029.

It is an arithmetic number, because the mean of its divisors is an integer number (1047276945).

Almost surely, 2^28825875765 is an apocalyptic number.

It is an amenable number.

28825875765 is a deficient number, since it is larger than the sum of its proper divisors (21443417595).

28825875765 is a wasteful number, since it uses less digits than its factorization.

28825875765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5174 (or 5171 counting only the distinct ones).

The product of its digits is 75264000, while the sum is 63.

The spelling of 28825875765 in words is "twenty-eight billion, eight hundred twenty-five million, eight hundred seventy-five thousand, seven hundred sixty-five".