28790000838 has 24 divisors (see below), whose sum is σ = 65661406200. Its totient is φ = 9091579104.

The previous prime is 28790000801. The next prime is 28790000843. The reversal of 28790000838 is 83800009782.

It is a junction number, because it is equal to n+sod(n) for n = 28790000793 and 28790000802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42090303 + ... + 42090986.

It is an arithmetic number, because the mean of its divisors is an integer number (2735891925).

Almost surely, 2^28790000838 is an apocalyptic number.

28790000838 is an abundant number, since it is smaller than the sum of its proper divisors (36871405362).

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

28790000838 is a wasteful number, since it uses less digits than its factorization.

28790000838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84181316 (or 84181313 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The spelling of 28790000838 in words is "twenty-eight billion, seven hundred ninety million, eight hundred thirty-eight", and thus it is an aban number.