28700992 has 28 divisors (see below), whose sum is σ = 57237376. Its totient is φ = 14279040.

The previous prime is 28700977. The next prime is 28701019. The reversal of 28700992 is 29900782.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13267 + ... + 15277.

It is an arithmetic number, because the mean of its divisors is an integer number (2044192).

Almost surely, 2^28700992 is an apocalyptic number.

It is an amenable number.

28700992 is a deficient number, since it is larger than the sum of its proper divisors (28536384).

28700992 is a wasteful number, since it uses less digits than its factorization.

28700992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2246 (or 2236 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 28700992 is about 5357.3306786123. The cubic root of 28700992 is about 306.1721161380.

It can be divided in two parts, 28700 and 992, that added together give a palindrome (29692).

The spelling of 28700992 in words is "twenty-eight million, seven hundred thousand, nine hundred ninety-two".