28007772168 has 64 divisors (see below), whose sum is σ = 73728864000. Its totient is φ = 8841655872.

The previous prime is 28007772137. The next prime is 28007772211. The reversal of 28007772168 is 86127770082.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1696771 + ... + 1713197.

It is an arithmetic number, because the mean of its divisors is an integer number (1152013500).

Almost surely, 2^28007772168 is an apocalyptic number.

It is an amenable number.

28007772168 is an abundant number, since it is smaller than the sum of its proper divisors (45721091832).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28007772168 is a wasteful number, since it uses less digits than its factorization.

28007772168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20194 (or 20190 counting only the distinct ones).

The product of its (nonzero) digits is 526848, while the sum is 48.

The spelling of 28007772168 in words is "twenty-eight billion, seven million, seven hundred seventy-two thousand, one hundred sixty-eight".