28390322 has 12 divisors (see below), whose sum is σ = 43771770. Its totient is φ = 13810176.

The previous prime is 28390321. The next prime is 28390337. The reversal of 28390322 is 22309382.

It can be written as a sum of positive squares in 3 ways, for example, as 27133681 + 1256641 = 5209^2 + 1121^2 .

It is not an unprimeable number, because it can be changed into a prime (28390321) 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 in 5 ways as a sum of consecutive naturals, for example, 2447 + ... + 7922.

Almost surely, 2^28390322 is an apocalyptic number.

28390322 is a deficient number, since it is larger than the sum of its proper divisors (15381448).

28390322 is a wasteful number, since it uses less digits than its factorization.

28390322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10445 (or 10408 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 28390322 is about 5328.2569382491. The cubic root of 28390322 is about 305.0633998813.

The spelling of 28390322 in words is "twenty-eight million, three hundred ninety thousand, three hundred twenty-two".