28816612 has 12 divisors (see below), whose sum is σ = 55013616. Its totient is φ = 13098440.

The previous prime is 28816609. The next prime is 28816643. The reversal of 28816612 is 21661882.

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, 327418 + ... + 327505.

It is an arithmetic number, because the mean of its divisors is an integer number (4584468).

Almost surely, 2^28816612 is an apocalyptic number.

28816612 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

28816612 is a deficient number, since it is larger than the sum of its proper divisors (26197004).

28816612 is a wasteful number, since it uses less digits than its factorization.

28816612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 654938 (or 654936 counting only the distinct ones).

The product of its digits is 9216, while the sum is 34.

The square root of 28816612 is about 5368.1106545972. The cubic root of 28816612 is about 306.5826965014.

It can be divided in two parts, 288 and 16612, that added together give a square (16900 = 130²).

The spelling of 28816612 in words is "twenty-eight million, eight hundred sixteen thousand, six hundred twelve".