122423440 has 20 divisors (see below), whose sum is σ = 284634684. Its totient is φ = 48969344.

The previous prime is 122423429. The next prime is 122423447. The reversal of 122423440 is 44324221.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 29030544 + 93392896 = 5388^2 + 9664^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×122423440² = 29974997322867200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (122423447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 765067 + ... + 765226.

Almost surely, 2^122423440 is an apocalyptic number.

122423440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

122423440 is an abundant number, since it is smaller than the sum of its proper divisors (162211244).

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

122423440 is a wasteful number, since it uses less digits than its factorization.

122423440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1530306 (or 1530300 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 122423440 is about 11064.5126417751. The cubic root of 122423440 is about 496.5407084659.

Adding to 122423440 its reverse (44324221), we get a palindrome (166747661).

The spelling of 122423440 in words is "one hundred twenty-two million, four hundred twenty-three thousand, four hundred forty".