28765396 has 24 divisors (see below), whose sum is σ = 56689920. Its totient is φ = 12652800.

The previous prime is 28765381. The next prime is 28765403. The reversal of 28765396 is 69356782.

It is a congruent number.

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, 9181 + ... + 11908.

It is an arithmetic number, because the mean of its divisors is an integer number (2362080).

Almost surely, 2^28765396 is an apocalyptic number.

It is an amenable number.

28765396 is a deficient number, since it is larger than the sum of its proper divisors (27924524).

28765396 is a wasteful number, since it uses less digits than its factorization.

28765396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21135 (or 21133 counting only the distinct ones).

The product of its digits is 544320, while the sum is 46.

The square root of 28765396 is about 5363.3381396291. The cubic root of 28765396 is about 306.4009581466.

It can be divided in two parts, 28765 and 396, that added together give a triangular number (29161 = T₂₄₁).

The spelling of 28765396 in words is "twenty-eight million, seven hundred sixty-five thousand, three hundred ninety-six".