28840977420 has 96 divisors (see below), whose sum is σ = 88700935680. Its totient is φ = 6969346560.

The previous prime is 28840977391. The next prime is 28840977421. The reversal of 28840977420 is 2477904882.

It is not an unprimeable number, because it can be changed into a prime (28840977421) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 523761 + ... + 576200.

It is an arithmetic number, because the mean of its divisors is an integer number (923968080).

Almost surely, 2^28840977420 is an apocalyptic number.

28840977420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28840977420 is an abundant number, since it is smaller than the sum of its proper divisors (59859958260).

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

28840977420 is a wasteful number, since it uses less digits than its factorization.

28840977420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1100015 (or 1100013 counting only the distinct ones).

The product of its (nonzero) digits is 1806336, while the sum is 51.

The spelling of 28840977420 in words is "twenty-eight billion, eight hundred forty million, nine hundred seventy-seven thousand, four hundred twenty".