28751312 has 20 divisors (see below), whose sum is σ = 55814880. Its totient is φ = 14347488.

The previous prime is 28751309. The next prime is 28751323. The reversal of 28751312 is 21315782.

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, 8453 + ... + 11355.

It is an arithmetic number, because the mean of its divisors is an integer number (2790744).

Almost surely, 2^28751312 is an apocalyptic number.

It is an amenable number.

28751312 is a deficient number, since it is larger than the sum of its proper divisors (27063568).

28751312 is a wasteful number, since it uses less digits than its factorization.

28751312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3530 (or 3524 counting only the distinct ones).

The product of its digits is 3360, while the sum is 29.

The square root of 28751312 is about 5362.0249906169. The cubic root of 28751312 is about 306.3509437059.

The spelling of 28751312 in words is "twenty-eight million, seven hundred fifty-one thousand, three hundred twelve".