28087912 has 16 divisors (see below), whose sum is σ = 52747200. Its totient is φ = 14022000.

The previous prime is 28087907. The next prime is 28087919. The reversal of 28087912 is 21978082.

It is not an unprimeable number, because it can be changed into a prime (28087919) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3537 + ... + 8287.

It is an arithmetic number, because the mean of its divisors is an integer number (3296700).

Almost surely, 2^28087912 is an apocalyptic number.

It is an amenable number.

28087912 is a deficient number, since it is larger than the sum of its proper divisors (24659288).

28087912 is a wasteful number, since it uses less digits than its factorization.

28087912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5496 (or 5492 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 28087912 is about 5299.8030152073. The cubic root of 28087912 is about 303.9763658912.

The spelling of 28087912 in words is "twenty-eight million, eighty-seven thousand, nine hundred twelve".