122342440 has 32 divisors (see below), whose sum is σ = 300296160. Its totient is φ = 44488000.

The previous prime is 122342431. The next prime is 122342447. The reversal of 122342440 is 44243221.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (122342447) 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, 138586 + ... + 139465.

It is an arithmetic number, because the mean of its divisors is an integer number (9384255).

Almost surely, 2^122342440 is an apocalyptic number.

122342440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

122342440 is an abundant number, since it is smaller than the sum of its proper divisors (177953720).

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

122342440 is a wasteful number, since it uses less digits than its factorization.

122342440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278073 (or 278069 counting only the distinct ones).

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

The square root of 122342440 is about 11060.8516851100. The cubic root of 122342440 is about 496.4311742379.

Adding to 122342440 its reverse (44243221), we get a palindrome (166585661).

The spelling of 122342440 in words is "one hundred twenty-two million, three hundred forty-two thousand, four hundred forty".