28961361292 has 12 divisors (see below), whose sum is σ = 50748294520. Its totient is φ = 14461848576.

The previous prime is 28961361271. The next prime is 28961361307. The reversal of 28961361292 is 29216316982.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4704558 + ... + 4710709.

Almost surely, 2^28961361292 is an apocalyptic number.

It is an amenable number.

28961361292 is a deficient number, since it is larger than the sum of its proper divisors (21786933228).

28961361292 is a wasteful number, since it uses less digits than its factorization.

28961361292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9416040 (or 9416038 counting only the distinct ones).

The product of its digits is 559872, while the sum is 49.

The spelling of 28961361292 in words is "twenty-eight billion, nine hundred sixty-one million, three hundred sixty-one thousand, two hundred ninety-two".