28169966460 has 48 divisors (see below), whose sum is σ = 79641709056. Its totient is φ = 7439057472.

The previous prime is 28169966449. The next prime is 28169966477. The reversal of 28169966460 is 6466996182.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 28169966460.

It is a congruent 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, 2272944 + ... + 2285303.

It is an arithmetic number, because the mean of its divisors is an integer number (1659202272).

Almost surely, 2^28169966460 is an apocalyptic number.

28169966460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28169966460 is an abundant number, since it is smaller than the sum of its proper divisors (51471742596).

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

28169966460 is a wasteful number, since it uses less digits than its factorization.

28169966460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4558362 (or 4558360 counting only the distinct ones).

The product of its (nonzero) digits is 6718464, while the sum is 57.

The spelling of 28169966460 in words is "twenty-eight billion, one hundred sixty-nine million, nine hundred sixty-six thousand, four hundred sixty".