28499812 has 12 divisors (see below), whose sum is σ = 54408816. Its totient is φ = 12954440.

The previous prime is 28499777. The next prime is 28499831. The reversal of 28499812 is 21899482.

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, 323818 + ... + 323905.

It is an arithmetic number, because the mean of its divisors is an integer number (4534068).

Almost surely, 2^28499812 is an apocalyptic number.

28499812 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

28499812 is a deficient number, since it is larger than the sum of its proper divisors (25909004).

28499812 is a wasteful number, since it uses less digits than its factorization.

28499812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 647738 (or 647736 counting only the distinct ones).

The product of its digits is 82944, while the sum is 43.

The square root of 28499812 is about 5338.5215181734. The cubic root of 28499812 is about 305.4550655676.

The spelling of 28499812 in words is "twenty-eight million, four hundred ninety-nine thousand, eight hundred twelve".