28172887296 has 72 divisors (see below), whose sum is σ = 77399771904. Its totient is φ = 9088020480.

The previous prime is 28172887273. The next prime is 28172887297. The reversal of 28172887296 is 69278827182.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28172887297) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 567861 + ... + 615476.

It is an arithmetic number, because the mean of its divisors is an integer number (1074996832).

Almost surely, 2^28172887296 is an apocalyptic number.

It is an amenable number.

28172887296 is an abundant number, since it is smaller than the sum of its proper divisors (49226884608).

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

28172887296 is a wasteful number, since it uses less digits than its factorization.

28172887296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1183387 (or 1183373 counting only the distinct ones).

The product of its digits is 10838016, while the sum is 60.

The spelling of 28172887296 in words is "twenty-eight billion, one hundred seventy-two million, eight hundred eighty-seven thousand, two hundred ninety-six".