22400340 has 24 divisors (see below), whose sum is σ = 62721120. Its totient is φ = 5973408.

The previous prime is 22400333. The next prime is 22400369. The reversal of 22400340 is 4300422.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 186610 + ... + 186729.

It is an arithmetic number, because the mean of its divisors is an integer number (2613380).

Almost surely, 2^22400340 is an apocalyptic number.

22400340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22400340 is an abundant number, since it is smaller than the sum of its proper divisors (40320780).

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

22400340 is a wasteful number, since it uses less digits than its factorization.

22400340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373351 (or 373349 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 15.

The square root of 22400340 is about 4732.8997453992. The cubic root of 22400340 is about 281.8933755144.

Adding to 22400340 its reverse (4300422), we get a palindrome (26700762).

The spelling of 22400340 in words is "twenty-two million, four hundred thousand, three hundred forty".