28147927167778 has 64 divisors (see below), whose sum is σ = 49107081793536. Its totient is φ = 11958868512000.

The previous prime is 28147927167757. The next prime is 28147927167781. The reversal of 28147927167778 is 87776172974182.

It is a super-2 number, since 2×28147927167778² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31074601 + ... + 31967587.

It is an arithmetic number, because the mean of its divisors is an integer number (767298153024).

Almost surely, 2^{28147927167778} is an apocalyptic number.

28147927167778 is a deficient number, since it is larger than the sum of its proper divisors (20959154625758).

28147927167778 is a wasteful number, since it uses less digits than its factorization.

28147927167778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 893599.

The product of its digits is 929359872, while the sum is 76.

The spelling of 28147927167778 in words is "twenty-eight trillion, one hundred forty-seven billion, nine hundred twenty-seven million, one hundred sixty-seven thousand, seven hundred seventy-eight".