122243440 has 80 divisors (see below), whose sum is σ = 316024416. Its totient is φ = 43596800.

The previous prime is 122243437. The next prime is 122243467. The reversal of 122243440 is 44342221.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45330 + ... + 47950.

Almost surely, 2^122243440 is an apocalyptic number.

122243440 is a gapful number since it is divisible by the number (10) 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 122243440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (158012208).

122243440 is an abundant number, since it is smaller than the sum of its proper divisors (193780976).

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

122243440 is a wasteful number, since it uses less digits than its factorization.

122243440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2698 (or 2692 counting only the distinct ones).

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

The square root of 122243440 is about 11056.3755363139. The cubic root of 122243440 is about 496.2972333945.

Adding to 122243440 its reverse (44342221), we get a palindrome (166585661).

The spelling of 122243440 in words is "one hundred twenty-two million, two hundred forty-three thousand, four hundred forty".