28732957880 has 64 divisors (see below), whose sum is σ = 70948846080. Its totient is φ = 10385756800.

The previous prime is 28732957843. The next prime is 28732957907. The reversal of 28732957880 is 8875923782.

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, 122036 + ... + 268995.

It is an arithmetic number, because the mean of its divisors is an integer number (1108575720).

Almost surely, 2^28732957880 is an apocalyptic number.

28732957880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28732957880 is an abundant number, since it is smaller than the sum of its proper divisors (42215888200).

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

28732957880 is a wasteful number, since it uses less digits than its factorization.

28732957880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391220 (or 391216 counting only the distinct ones).

The product of its (nonzero) digits is 13547520, while the sum is 59.

The spelling of 28732957880 in words is "twenty-eight billion, seven hundred thirty-two million, nine hundred fifty-seven thousand, eight hundred eighty".