28170666960 has 80 divisors (see below), whose sum is σ = 87348456960. Its totient is φ = 7510510080.

The previous prime is 28170666919. The next prime is 28170666967. The reversal of 28170666960 is 6966607182.

It is a tau number, because it is divible by the number of its divisors (80).

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28170666967) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1379706 + ... + 1399974.

It is an arithmetic number, because the mean of its divisors is an integer number (1091855712).

Almost surely, 2^28170666960 is an apocalyptic number.

28170666960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28170666960 is an abundant number, since it is smaller than the sum of its proper divisors (59177790000).

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

28170666960 is a wasteful number, since it uses less digits than its factorization.

28170666960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26076 (or 26070 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 51.

The spelling of 28170666960 in words is "twenty-eight billion, one hundred seventy million, six hundred sixty-six thousand, nine hundred sixty".