22942440 has 160 divisors (see below), whose sum is σ = 78974280. Its totient is φ = 5971968.

The previous prime is 22942433. The next prime is 22942457. The reversal of 22942440 is 4424922.

It can be written as a sum of positive squares in 4 ways, for example, as 18507204 + 4435236 = 4302^2 + 2106^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 236472 + ... + 236568.

Almost surely, 2^22942440 is an apocalyptic number.

22942440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22942440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39487140).

22942440 is an abundant number, since it is smaller than the sum of its proper divisors (56031840).

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

22942440 is a wasteful number, since it uses less digits than its factorization.

22942440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193 (or 180 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 22942440 is about 4789.8267192039. The cubic root of 22942440 is about 284.1492635986.

The spelling of 22942440 in words is "twenty-two million, nine hundred forty-two thousand, four hundred forty".