28042292 has 6 divisors (see below), whose sum is σ = 49074018. Its totient is φ = 14021144.

The previous prime is 28042291. The next prime is 28042307. The reversal of 28042292 is 29224082.

It can be written as a sum of positive squares in only one way, i.e., 27836176 + 206116 = 5276^2 + 454^2 .

It is a super-2 number, since 2×28042292² = 1572740281226528, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28042291) by changing a digit.

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 as a sum of consecutive naturals, namely, 3505283 + ... + 3505290.

It is an arithmetic number, because the mean of its divisors is an integer number (8179003).

Almost surely, 2^28042292 is an apocalyptic number.

It is an amenable number.

28042292 is a deficient number, since it is larger than the sum of its proper divisors (21031726).

28042292 is a wasteful number, since it uses less digits than its factorization.

28042292 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7010577 (or 7010575 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 28042292 is about 5295.4973326402. The cubic root of 28042292 is about 303.8117053029.

The spelling of 28042292 in words is "twenty-eight million, forty-two thousand, two hundred ninety-two".