28238296880 has 20 divisors (see below), whose sum is σ = 65654040432. Its totient is φ = 11295318720.

The previous prime is 28238296847. The next prime is 28238296903. The reversal of 28238296880 is 8869283282.

It is a tau number, because it is divible by the number of its divisors (20).

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 176489276 + ... + 176489435.

Almost surely, 2^28238296880 is an apocalyptic number.

28238296880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28238296880 is an abundant number, since it is smaller than the sum of its proper divisors (37415743552).

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

28238296880 is a wasteful number, since it uses less digits than its factorization.

28238296880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352978724 (or 352978718 counting only the distinct ones).

The product of its (nonzero) digits is 5308416, while the sum is 56.

The spelling of 28238296880 in words is "twenty-eight billion, two hundred thirty-eight million, two hundred ninety-six thousand, eight hundred eighty".