28652981738 has 16 divisors (see below), whose sum is σ = 45512016264. Its totient is φ = 13482470400.

The previous prime is 28652981729. The next prime is 28652981761. The reversal of 28652981738 is 83718925682.

It can be written as a sum of positive squares in 4 ways, for example, as 19370237329 + 9282744409 = 139177^2 + 96347^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 387656 + ... + 455612.

Almost surely, 2^28652981738 is an apocalyptic number.

28652981738 is a deficient number, since it is larger than the sum of its proper divisors (16859034526).

28652981738 is a wasteful number, since it uses less digits than its factorization.

28652981738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80377.

The product of its digits is 11612160, while the sum is 59.

The spelling of 28652981738 in words is "twenty-eight billion, six hundred fifty-two million, nine hundred eighty-one thousand, seven hundred thirty-eight".