28055312 has 20 divisors (see below), whose sum is σ = 55170576. Its totient is φ = 13817760.

The previous prime is 28055309. The next prime is 28055317. The reversal of 28055312 is 21355082.

It is not an unprimeable number, because it can be changed into a prime (28055317) 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, 12014 + ... + 14157.

Almost surely, 2^28055312 is an apocalyptic number.

It is an amenable number.

28055312 is a deficient number, since it is larger than the sum of its proper divisors (27115264).

28055312 is a wasteful number, since it uses less digits than its factorization.

28055312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26246 (or 26240 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 28055312 is about 5296.7265362675. The cubic root of 28055312 is about 303.8587178220.

The spelling of 28055312 in words is "twenty-eight million, fifty-five thousand, three hundred twelve".