28774228012 has 12 divisors (see below), whose sum is σ = 50363519920. Its totient is φ = 14384650896.

The previous prime is 28774228003. The next prime is 28774228031. The reversal of 28774228012 is 21082247782.

It is a self number, because there is not a number n which added to its sum of digits gives 28774228012.

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, 589368 + ... + 636319.

Almost surely, 2^28774228012 is an apocalyptic number.

It is an amenable number.

28774228012 is a deficient number, since it is larger than the sum of its proper divisors (21589291908).

28774228012 is a wasteful number, since it uses less digits than its factorization.

28774228012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1231560 (or 1231558 counting only the distinct ones).

The product of its (nonzero) digits is 200704, while the sum is 43.

The spelling of 28774228012 in words is "twenty-eight billion, seven hundred seventy-four million, two hundred twenty-eight thousand, twelve".