28385892 has 18 divisors (see below), whose sum is σ = 71753318. Its totient is φ = 9461952.

The previous prime is 28385881. The next prime is 28385909. The reversal of 28385892 is 29858382.

It can be written as a sum of positive squares in only one way, i.e., 21288996 + 7096896 = 4614^2 + 2664^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 394213 + ... + 394284.

Almost surely, 2^28385892 is an apocalyptic number.

It is an amenable number.

28385892 is an abundant number, since it is smaller than the sum of its proper divisors (43367426).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28385892 is a wasteful number, since it uses less digits than its factorization.

28385892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 788507 (or 788502 counting only the distinct ones).

The product of its digits is 276480, while the sum is 45.

The square root of 28385892 is about 5327.8412138501. The cubic root of 28385892 is about 305.0475317841.

The spelling of 28385892 in words is "twenty-eight million, three hundred eighty-five thousand, eight hundred ninety-two".