28205764 has 12 divisors (see below), whose sum is σ = 50508304. Its totient is φ = 13774824.

The previous prime is 28205711. The next prime is 28205767. The reversal of 28205764 is 46750282.

It is not an unprimeable number, because it can be changed into a prime (28205767) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81822 + ... + 82165.

Almost surely, 2^28205764 is an apocalyptic number.

It is an amenable number.

28205764 is a deficient number, since it is larger than the sum of its proper divisors (22302540).

28205764 is a wasteful number, since it uses less digits than its factorization.

28205764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164034 (or 164032 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 34.

The square root of 28205764 is about 5310.9099032087. The cubic root of 28205764 is about 304.4009166738.

The spelling of 28205764 in words is "twenty-eight million, two hundred five thousand, seven hundred sixty-four".