28912105782 has 48 divisors (see below), whose sum is σ = 75359880960. Its totient is φ = 7825832496.

The previous prime is 28912105757. The next prime is 28912105847. The reversal of 28912105782 is 28750121982.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6036058 + ... + 6040845.

It is an arithmetic number, because the mean of its divisors is an integer number (1569997520).

Almost surely, 2^28912105782 is an apocalyptic number.

28912105782 is an abundant number, since it is smaller than the sum of its proper divisors (46447775178).

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

28912105782 is a wasteful number, since it uses less digits than its factorization.

28912105782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12076937 (or 12076934 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 45.

The spelling of 28912105782 in words is "twenty-eight billion, nine hundred twelve million, one hundred five thousand, seven hundred eighty-two".