28078575188 has 12 divisors (see below), whose sum is σ = 49156847040. Its totient is φ = 14033761752.

The previous prime is 28078575167. The next prime is 28078575233. The reversal of 28078575188 is 88157587082.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1370018 + ... + 1390361.

It is an arithmetic number, because the mean of its divisors is an integer number (4096403920).

Almost surely, 2^28078575188 is an apocalyptic number.

It is an amenable number.

28078575188 is a deficient number, since it is larger than the sum of its proper divisors (21078271852).

28078575188 is a wasteful number, since it uses less digits than its factorization.

28078575188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2762926 (or 2762924 counting only the distinct ones).

The product of its (nonzero) digits is 10035200, while the sum is 59.

The spelling of 28078575188 in words is "twenty-eight billion, seventy-eight million, five hundred seventy-five thousand, one hundred eighty-eight".