28812912 has 20 divisors (see below), whose sum is σ = 74433480. Its totient is φ = 9604288.

The previous prime is 28812907. The next prime is 28812937. The reversal of 28812912 is 21921882.

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, 300087 + ... + 300182.

It is an arithmetic number, because the mean of its divisors is an integer number (3721674).

Almost surely, 2^28812912 is an apocalyptic number.

It is an amenable number.

28812912 is an abundant number, since it is smaller than the sum of its proper divisors (45620568).

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

28812912 is a wasteful number, since it uses less digits than its factorization.

28812912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 600280 (or 600274 counting only the distinct ones).

The product of its digits is 4608, while the sum is 33.

The square root of 28812912 is about 5367.7660157648. The cubic root of 28812912 is about 306.5695743883.

The spelling of 28812912 in words is "twenty-eight million, eight hundred twelve thousand, nine hundred twelve".