28157274412 has 24 divisors (see below), whose sum is σ = 49573378400. Its totient is φ = 13993534080.

The previous prime is 28157274377. The next prime is 28157274421. The reversal of 28157274412 is 21447275182.

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, 1538089 + ... + 1556287.

Almost surely, 2^28157274412 is an apocalyptic number.

It is an amenable number.

28157274412 is a deficient number, since it is larger than the sum of its proper divisors (21416103988).

28157274412 is a wasteful number, since it uses less digits than its factorization.

28157274412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20521 (or 20519 counting only the distinct ones).

The product of its digits is 250880, while the sum is 43.

The spelling of 28157274412 in words is "twenty-eight billion, one hundred fifty-seven million, two hundred seventy-four thousand, four hundred twelve".