28196432880 has 160 divisors (see below), whose sum is σ = 108977453568. Its totient is φ = 5858995200.

The previous prime is 28196432879. The next prime is 28196432893. The reversal of 28196432880 is 8823469182.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 744411 + ... + 781370.

Almost surely, 2^28196432880 is an apocalyptic number.

28196432880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28196432880 is an abundant number, since it is smaller than the sum of its proper divisors (80781020688).

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

28196432880 is a wasteful number, since it uses less digits than its factorization.

28196432880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1525815 (or 1525809 counting only the distinct ones).

The product of its (nonzero) digits is 1327104, while the sum is 51.

The spelling of 28196432880 in words is "twenty-eight billion, one hundred ninety-six million, four hundred thirty-two thousand, eight hundred eighty".