28042792 has 16 divisors (see below), whose sum is σ = 55673460. Its totient is φ = 13196544.

The previous prime is 28042789. The next prime is 28042801. The reversal of 28042792 is 29724082.

It can be written as a sum of positive squares in 2 ways, for example, as 21104836 + 6937956 = 4594^2 + 2634^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

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 3 ways as a sum of consecutive naturals, for example, 102963 + ... + 103234.

Almost surely, 2^28042792 is an apocalyptic number.

It is an amenable number.

28042792 is a deficient number, since it is larger than the sum of its proper divisors (27630668).

28042792 is a wasteful number, since it uses less digits than its factorization.

28042792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206220 (or 206216 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 28042792 is about 5295.5445423488. The cubic root of 28042792 is about 303.8135109678.

The spelling of 28042792 in words is "twenty-eight million, forty-two thousand, seven hundred ninety-two".