122312440 has 16 divisors (see below), whose sum is σ = 275203080. Its totient is φ = 48924960.

The previous prime is 122312431. The next prime is 122312447. The reversal of 122312440 is 44213221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122312447) 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, 1528866 + ... + 1528945.

Almost surely, 2^122312440 is an apocalyptic number.

122312440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

122312440 is an abundant number, since it is smaller than the sum of its proper divisors (152890640).

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

122312440 is a wasteful number, since it uses less digits than its factorization.

122312440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3057822 (or 3057818 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 122312440 is about 11059.4954676965. The cubic root of 122312440 is about 496.3905937364.

Adding to 122312440 its reverse (44213221), we get a palindrome (166525661).

The spelling of 122312440 in words is "one hundred twenty-two million, three hundred twelve thousand, four hundred forty".