22343240 has 32 divisors (see below), whose sum is σ = 52920000. Its totient is φ = 8466624.

The previous prime is 22343231. The next prime is 22343249. The reversal of 22343240 is 4234322.

It is an interprime number because it is at equal distance from previous prime (22343231) and next prime (22343249).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (22343249) 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, 13940 + ... + 15459.

It is an arithmetic number, because the mean of its divisors is an integer number (1653750).

Almost surely, 2^22343240 is an apocalyptic number.

22343240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22343240 is an abundant number, since it is smaller than the sum of its proper divisors (30576760).

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

22343240 is a wasteful number, since it uses less digits than its factorization.

22343240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29429 (or 29425 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 20.

The square root of 22343240 is about 4726.8636536291. The cubic root of 22343240 is about 281.6536498698.

Adding to 22343240 its reverse (4234322), we get a palindrome (26577562).

The spelling of 22343240 in words is "twenty-two million, three hundred forty-three thousand, two hundred forty".