28286744 has 16 divisors (see below), whose sum is σ = 55829400. Its totient is φ = 13398912.

The previous prime is 28286729. The next prime is 28286747. The reversal of 28286744 is 44768282.

It is a super-2 number, since 2×28286744² = 1600279772243072, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28286747) 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, 92897 + ... + 93200.

Almost surely, 2^28286744 is an apocalyptic number.

It is an amenable number.

28286744 is a deficient number, since it is larger than the sum of its proper divisors (27542656).

28286744 is a wasteful number, since it uses less digits than its factorization.

28286744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186122 (or 186118 counting only the distinct ones).

The product of its digits is 172032, while the sum is 41.

The square root of 28286744 is about 5318.5283678852. The cubic root of 28286744 is about 304.6919545034.

The spelling of 28286744 in words is "twenty-eight million, two hundred eighty-six thousand, seven hundred forty-four".