28306126731 has 16 divisors (see below), whose sum is σ = 38626865024. Its totient is φ = 18428243904.

The previous prime is 28306126729. The next prime is 28306126769. The reversal of 28306126731 is 13762160382.

It is not a de Polignac number, because 28306126731 - 2¹ = 28306126729 is a prime.

It is a super-2 number, since 2×28306126731² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28306126731.

It is not an unprimeable number, because it can be changed into a prime (28306126931) 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, 732855 + ... + 770511.

It is an arithmetic number, because the mean of its divisors is an integer number (2414179064).

Almost surely, 2^28306126731 is an apocalyptic number.

28306126731 is a deficient number, since it is larger than the sum of its proper divisors (10320738293).

28306126731 is a wasteful number, since it uses less digits than its factorization.

28306126731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43530.

The product of its (nonzero) digits is 72576, while the sum is 39.

The spelling of 28306126731 in words is "twenty-eight billion, three hundred six million, one hundred twenty-six thousand, seven hundred thirty-one".