28312748 has 24 divisors (see below), whose sum is σ = 51252432. Its totient is φ = 13676544.

The previous prime is 28312727. The next prime is 28312751. The reversal of 28312748 is 84721382.

It is a super-2 number, since 2×28312748² = 1603223398623008, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15836 + ... + 17532.

It is an arithmetic number, because the mean of its divisors is an integer number (2135518).

Almost surely, 2^28312748 is an apocalyptic number.

It is an amenable number.

28312748 is a deficient number, since it is larger than the sum of its proper divisors (22939684).

28312748 is a wasteful number, since it uses less digits than its factorization.

28312748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1841 (or 1839 counting only the distinct ones).

The product of its digits is 21504, while the sum is 35.

The square root of 28312748 is about 5320.9724675101. The cubic root of 28312748 is about 304.7852936647.

It can be divided in two parts, 283 and 12748, that added together give a palindrome (13031).

The spelling of 28312748 in words is "twenty-eight million, three hundred twelve thousand, seven hundred forty-eight".