28292422 has 4 divisors (see below), whose sum is σ = 42438636. Its totient is φ = 14146210.

The previous prime is 28292401. The next prime is 28292441. The reversal of 28292422 is 22429282.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×28292422² = 1600922285252168, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7073104 + ... + 7073107.

It is an arithmetic number, because the mean of its divisors is an integer number (10609659).

Almost surely, 2^28292422 is an apocalyptic number.

28292422 is a deficient number, since it is larger than the sum of its proper divisors (14146214).

28292422 is a wasteful number, since it uses less digits than its factorization.

28292422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14146213.

The product of its digits is 9216, while the sum is 31.

The square root of 28292422 is about 5319.0621353769. The cubic root of 28292422 is about 304.7123400848.

The spelling of 28292422 in words is "twenty-eight million, two hundred ninety-two thousand, four hundred twenty-two".