28397322 has 24 divisors (see below), whose sum is σ = 63650340. Its totient is φ = 9139200.

The previous prime is 28397311. The next prime is 28397323. The reversal of 28397322 is 22379382.

It can be written as a sum of positive squares in 2 ways, for example, as 27973521 + 423801 = 5289^2 + 651^2 .

It is not an unprimeable number, because it can be changed into a prime (28397323) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26679 + ... + 27722.

Almost surely, 2^28397322 is an apocalyptic number.

28397322 is an abundant number, since it is smaller than the sum of its proper divisors (35253018).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28397322 is a wasteful number, since it uses less digits than its factorization.

28397322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54438 (or 54435 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 28397322 is about 5328.9137729935. The cubic root of 28397322 is about 305.0884702593.

The spelling of 28397322 in words is "twenty-eight million, three hundred ninety-seven thousand, three hundred twenty-two".