28691300506 has 24 divisors (see below), whose sum is σ = 47319349140. Its totient is φ = 13037566080.

The previous prime is 28691300489. The next prime is 28691300567. The reversal of 28691300506 is 60500319682.

It can be written as a sum of positive squares in 2 ways, for example, as 28580945481 + 110355025 = 169059^2 + 10505^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 878640 + ... + 910708.

Almost surely, 2^28691300506 is an apocalyptic number.

28691300506 is a deficient number, since it is larger than the sum of its proper divisors (18628048634).

28691300506 is a wasteful number, since it uses less digits than its factorization.

28691300506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35790 (or 35779 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 40.

The spelling of 28691300506 in words is "twenty-eight billion, six hundred ninety-one million, three hundred thousand, five hundred six".