28785796 has 12 divisors (see below), whose sum is σ = 54250252. Its totient is φ = 13285728.

The previous prime is 28785787. The next prime is 28785803. The reversal of 28785796 is 69758782.

It can be written as a sum of positive squares in 2 ways, for example, as 16112196 + 12673600 = 4014^2 + 3560^2 .

It is a Harshad number since it is a multiple of its sum of digits (52), and also a Moran number because the ratio is a prime number: 553573 = 28785796 / (2 + 8 + 7 + 8 + 5 + 7 + 9 + 6).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 276735 + ... + 276838.

Almost surely, 2^28785796 is an apocalyptic number.

28785796 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

28785796 is a deficient number, since it is larger than the sum of its proper divisors (25464456).

28785796 is a wasteful number, since it uses less digits than its factorization.

28785796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 553590 (or 553588 counting only the distinct ones).

The product of its digits is 1693440, while the sum is 52.

The square root of 28785796 is about 5365.2396032237. The cubic root of 28785796 is about 306.4733727302.

The spelling of 28785796 in words is "twenty-eight million, seven hundred eighty-five thousand, seven hundred ninety-six".