28896979440 has 160 divisors (see below), whose sum is σ = 108400204800. Its totient is φ = 6216486912.

The previous prime is 28896979421. The next prime is 28896979451. The reversal of 28896979440 is 4497969882.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 477340 + ... + 534459.

It is an arithmetic number, because the mean of its divisors is an integer number (677501280).

Almost surely, 2^28896979440 is an apocalyptic number.

28896979440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28896979440 is an abundant number, since it is smaller than the sum of its proper divisors (79503225360).

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

28896979440 is a wasteful number, since it uses less digits than its factorization.

28896979440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1011839 (or 1011833 counting only the distinct ones).

The product of its (nonzero) digits is 62705664, while the sum is 66.

The spelling of 28896979440 in words is "twenty-eight billion, eight hundred ninety-six million, nine hundred seventy-nine thousand, four hundred forty".