28172622776 has 8 divisors (see below), whose sum is σ = 52823667720. Its totient is φ = 14086311384.

The previous prime is 28172622733. The next prime is 28172622787. The reversal of 28172622776 is 67722627182.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1760788916 + ... + 1760788931.

It is an arithmetic number, because the mean of its divisors is an integer number (6602958465).

Almost surely, 2^28172622776 is an apocalyptic number.

It is an amenable number.

28172622776 is a deficient number, since it is larger than the sum of its proper divisors (24651044944).

28172622776 is a wasteful number, since it uses less digits than its factorization.

28172622776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3521577853 (or 3521577849 counting only the distinct ones).

The product of its digits is 1580544, while the sum is 50.

The spelling of 28172622776 in words is "twenty-eight billion, one hundred seventy-two million, six hundred twenty-two thousand, seven hundred seventy-six".