28312456 has 16 divisors (see below), whose sum is σ = 53147340. Its totient is φ = 14139840.

The previous prime is 28312411. The next prime is 28312469. The reversal of 28312456 is 65421382.

It can be written as a sum of positive squares in 2 ways, for example, as 27562500 + 749956 = 5250^2 + 866^2 .

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, 8466 + ... + 11326.

Almost surely, 2^28312456 is an apocalyptic number.

It is an amenable number.

28312456 is a deficient number, since it is larger than the sum of its proper divisors (24834884).

28312456 is a wasteful number, since it uses less digits than its factorization.

28312456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4104 (or 4100 counting only the distinct ones).

The product of its digits is 11520, while the sum is 31.

The square root of 28312456 is about 5320.9450288459. The cubic root of 28312456 is about 304.7842458727.

The spelling of 28312456 in words is "twenty-eight million, three hundred twelve thousand, four hundred fifty-six".