28817892 has 18 divisors (see below), whose sum is σ = 72845318. Its totient is φ = 9605952.

The previous prime is 28817863. The next prime is 28817917. The reversal of 28817892 is 29871882.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 27941796 + 876096 = 5286^2 + 936^2 .

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, 400213 + ... + 400284.

Almost surely, 2^28817892 is an apocalyptic number.

It is an amenable number.

28817892 is an abundant number, since it is smaller than the sum of its proper divisors (44027426).

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

28817892 is a wasteful number, since it uses less digits than its factorization.

28817892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 800507 (or 800502 counting only the distinct ones).

The product of its digits is 129024, while the sum is 45.

The square root of 28817892 is about 5368.2298758529. The cubic root of 28817892 is about 306.5872357818.

The spelling of 28817892 in words is "twenty-eight million, eight hundred seventeen thousand, eight hundred ninety-two".