28676770731 has 18 divisors (see below), whose sum is σ = 48184778772. Its totient is φ = 16386725880.

The previous prime is 28676770687. The next prime is 28676770741. The reversal of 28676770731 is 13707767682.

It is not a de Polignac number, because 28676770731 - 2¹⁷ = 28676639659 is a prime.

It is a super-2 number, since 2×28676770731² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28676770741) by changing a digit.

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 17 ways as a sum of consecutive naturals, for example, 32512905 + ... + 32513786.

It is an arithmetic number, because the mean of its divisors is an integer number (2676932154).

Almost surely, 2^28676770731 is an apocalyptic number.

28676770731 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

28676770731 is a deficient number, since it is larger than the sum of its proper divisors (19508008041).

28676770731 is a wasteful number, since it uses less digits than its factorization.

28676770731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65026711 (or 65026701 counting only the distinct ones).

The product of its (nonzero) digits is 4148928, while the sum is 54.

The spelling of 28676770731 in words is "twenty-eight billion, six hundred seventy-six million, seven hundred seventy thousand, seven hundred thirty-one".