22422740 has 48 divisors (see below), whose sum is σ = 48920592. Its totient is φ = 8626176.

The previous prime is 22422733. The next prime is 22422761. The reversal of 22422740 is 4722422.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 163216 + 22259524 = 404^2 + 4718^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 116084 + ... + 116276.

It is an arithmetic number, because the mean of its divisors is an integer number (1019179).

Almost surely, 2^22422740 is an apocalyptic number.

22422740 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 22422740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24460296).

22422740 is an abundant number, since it is smaller than the sum of its proper divisors (26497852).

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

22422740 is a wasteful number, since it uses less digits than its factorization.

22422740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396 (or 394 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 23.

The square root of 22422740 is about 4735.2655680542. The cubic root of 22422740 is about 281.9873072435.

The spelling of 22422740 in words is "twenty-two million, four hundred twenty-two thousand, seven hundred forty".