28810185380 has 24 divisors (see below), whose sum is σ = 60597297600. Its totient is φ = 11505805920.

The previous prime is 28810185347. The next prime is 28810185421. The reversal of 28810185380 is 8358101882.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1128830 + ... + 1154069.

It is an arithmetic number, because the mean of its divisors is an integer number (2524887400).

Almost surely, 2^28810185380 is an apocalyptic number.

28810185380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28810185380 is an abundant number, since it is smaller than the sum of its proper divisors (31787112220).

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

28810185380 is a wasteful number, since it uses less digits than its factorization.

28810185380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2283539 (or 2283537 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 44.

The spelling of 28810185380 in words is "twenty-eight billion, eight hundred ten million, one hundred eighty-five thousand, three hundred eighty".