28422450 has 108 divisors (see below), whose sum is σ = 88897770. Its totient is φ = 6491520.

The previous prime is 28422439. The next prime is 28422463. The reversal of 28422450 is 5422482.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 24770529 + 3651921 = 4977^2 + 1911^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 21406 + ... + 22694.

Almost surely, 2^28422450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28422450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44448885).

28422450 is an abundant number, since it is smaller than the sum of its proper divisors (60475320).

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

28422450 is a wasteful number, since it uses less digits than its factorization.

28422450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1321 (or 1306 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 27.

The square root of 28422450 is about 5331.2709554102. The cubic root of 28422450 is about 305.1784318288.

The spelling of 28422450 in words is "twenty-eight million, four hundred twenty-two thousand, four hundred fifty".