28811045891904 has 112 divisors (see below), whose sum is σ = 80657050044480. Its totient is φ = 9051083735040.

The previous prime is 28811045891861. The next prime is 28811045891917. The reversal of 28811045891904 is 40919854011882.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19756467 + ... + 21164594.

It is an arithmetic number, because the mean of its divisors is an integer number (720152232540).

Almost surely, 2^{28811045891904} is an apocalyptic number.

28811045891904 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28811045891904 is an abundant number, since it is smaller than the sum of its proper divisors (51846004152576).

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

28811045891904 is a wasteful number, since it uses less digits than its factorization.

28811045891904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40921288 (or 40921278 counting only the distinct ones).

The product of its (nonzero) digits is 6635520, while the sum is 60.

The spelling of 28811045891904 in words is "twenty-eight trillion, eight hundred eleven billion, forty-five million, eight hundred ninety-one thousand, nine hundred four".