28665792 has 112 divisors (see below), whose sum is σ = 86136480. Its totient is φ = 9345024.

The previous prime is 28665781. The next prime is 28665809. The reversal of 28665792 is 29756682.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91428 + ... + 91740.

Almost surely, 2^28665792 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28665792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43068240).

28665792 is an abundant number, since it is smaller than the sum of its proper divisors (57470688).

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

28665792 is a wasteful number, since it uses less digits than its factorization.

28665792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387 (or 371 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 28665792 is about 5354.0444525611. The cubic root of 28665792 is about 306.0468978485.

The spelling of 28665792 in words is "twenty-eight million, six hundred sixty-five thousand, seven hundred ninety-two".