22292440 has 32 divisors (see below), whose sum is σ = 53110080. Its totient is φ = 8392192.

The previous prime is 22292407. The next prime is 22292449. The reversal of 22292440 is 4429222.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22292449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15712 + ... + 17071.

It is an arithmetic number, because the mean of its divisors is an integer number (1659690).

Almost surely, 2^22292440 is an apocalyptic number.

22292440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22292440 is an abundant number, since it is smaller than the sum of its proper divisors (30817640).

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

22292440 is a wasteful number, since it uses less digits than its factorization.

22292440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32811 (or 32807 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 22292440 is about 4721.4870538846. The cubic root of 22292440 is about 281.4400302578.

The spelling of 22292440 in words is "twenty-two million, two hundred ninety-two thousand, four hundred forty".