28768436 has 12 divisors (see below), whose sum is σ = 50843940. Its totient is φ = 14241600.

The previous prime is 28768427. The next prime is 28768447. The reversal of 28768436 is 63486782.

It can be written as a sum of positive squares in 2 ways, for example, as 12816400 + 15952036 = 3580^2 + 3994^2 .

It is a congruent number.

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, 35201 + ... + 36008.

It is an arithmetic number, because the mean of its divisors is an integer number (4236995).

Almost surely, 2^28768436 is an apocalyptic number.

It is an amenable number.

28768436 is a deficient number, since it is larger than the sum of its proper divisors (22075504).

28768436 is a wasteful number, since it uses less digits than its factorization.

28768436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71314 (or 71312 counting only the distinct ones).

The product of its digits is 387072, while the sum is 44.

The square root of 28768436 is about 5363.6215377299. The cubic root of 28768436 is about 306.4117515098.

The spelling of 28768436 in words is "twenty-eight million, seven hundred sixty-eight thousand, four hundred thirty-six".