22783398 has 32 divisors (see below), whose sum is σ = 50181120. Its totient is φ = 6838560.

The previous prime is 22783393. The next prime is 22783447. The reversal of 22783398 is 89338722.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22783393) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5611 + ... + 8777.

It is an arithmetic number, because the mean of its divisors is an integer number (1568160).

Almost surely, 2^22783398 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22783398, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25090560).

22783398 is an abundant number, since it is smaller than the sum of its proper divisors (27397722).

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

22783398 is a wasteful number, since it uses less digits than its factorization.

22783398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3292.

The product of its digits is 145152, while the sum is 42.

The square root of 22783398 is about 4773.1957847966. The cubic root of 22783398 is about 283.4911456103.

The spelling of 22783398 in words is "twenty-two million, seven hundred eighty-three thousand, three hundred ninety-eight".