28351422 has 72 divisors (see below), whose sum is σ = 69708600. Its totient is φ = 8258400.

The previous prime is 28351417. The next prime is 28351457. The reversal of 28351422 is 22415382.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 190204 + ... + 190352.

It is an arithmetic number, because the mean of its divisors is an integer number (968175).

Almost surely, 2^28351422 is an apocalyptic number.

28351422 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 28351422, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34854300).

28351422 is an abundant number, since it is smaller than the sum of its proper divisors (41357178).

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

28351422 is a wasteful number, since it uses less digits than its factorization.

28351422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230 (or 196 counting only the distinct ones).

The product of its digits is 3840, while the sum is 27.

The square root of 28351422 is about 5324.6053374875. The cubic root of 28351422 is about 304.9240050743.

The spelling of 28351422 in words is "twenty-eight million, three hundred fifty-one thousand, four hundred twenty-two".