28176344664 has 64 divisors (see below), whose sum is σ = 78306493440. Its totient is φ = 8389975680.

The previous prime is 28176344653. The next prime is 28176344683. The reversal of 28176344664 is 46644367182.

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, 1446922 + ... + 1466265.

It is an arithmetic number, because the mean of its divisors is an integer number (1223538960).

Almost surely, 2^28176344664 is an apocalyptic number.

28176344664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28176344664 is an abundant number, since it is smaller than the sum of its proper divisors (50130148776).

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

28176344664 is a wasteful number, since it uses less digits than its factorization.

28176344664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2913240 (or 2913236 counting only the distinct ones).

The product of its digits is 4644864, while the sum is 51.

The spelling of 28176344664 in words is "twenty-eight billion, one hundred seventy-six million, three hundred forty-four thousand, six hundred sixty-four".