122690040 has 128 divisors (see below), whose sum is σ = 411505920. Its totient is φ = 29004800.

The previous prime is 122690023. The next prime is 122690041. The reversal of 122690040 is 40096221.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122690041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 52987 + ... + 55253.

It is an arithmetic number, because the mean of its divisors is an integer number (3214890).

Almost surely, 2^122690040 is an apocalyptic number.

122690040 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 122690040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (205752960).

122690040 is an abundant number, since it is smaller than the sum of its proper divisors (288815880).

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

122690040 is a wasteful number, since it uses less digits than its factorization.

122690040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2333 (or 2329 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 122690040 is about 11076.5536156333. The cubic root of 122690040 is about 496.9008839805.

The spelling of 122690040 in words is "one hundred twenty-two million, six hundred ninety thousand, forty".