28057312 has 12 divisors (see below), whose sum is σ = 55237896. Its totient is φ = 14028640.

The previous prime is 28057307. The next prime is 28057343. The reversal of 28057312 is 21375082.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 438364 + ... + 438427.

It is an arithmetic number, because the mean of its divisors is an integer number (4603158).

Almost surely, 2^28057312 is an apocalyptic number.

It is an amenable number.

28057312 is a deficient number, since it is larger than the sum of its proper divisors (27180584).

28057312 is an equidigital number, since it uses as much as digits as its factorization.

28057312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 876801 (or 876793 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 28057312 is about 5296.9153287550. The cubic root of 28057312 is about 303.8659381183.

The spelling of 28057312 in words is "twenty-eight million, fifty-seven thousand, three hundred twelve".