28078875840 has 112 divisors (see below), whose sum is σ = 90612102240. Its totient is φ = 7364935680.

The previous prime is 28078875821. The next prime is 28078875917. The reversal of 28078875840 is 4857887082.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 181185 + ... + 298304.

Almost surely, 2^28078875840 is an apocalyptic number.

28078875840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28078875840 is an abundant number, since it is smaller than the sum of its proper divisors (62533226400).

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

28078875840 is a wasteful number, since it uses less digits than its factorization.

28078875840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 479570 (or 479560 counting only the distinct ones).

The product of its (nonzero) digits is 8028160, while the sum is 57.

The spelling of 28078875840 in words is "twenty-eight billion, seventy-eight million, eight hundred seventy-five thousand, eight hundred forty".