122006640 has 80 divisors (see below), whose sum is σ = 432258048. Its totient is φ = 27886848.

The previous prime is 122006623. The next prime is 122006659. The reversal of 122006640 is 46600221.

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 (21).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 34632 + ... + 37991.

Almost surely, 2^122006640 is an apocalyptic number.

122006640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

122006640 is an abundant number, since it is smaller than the sum of its proper divisors (310251408).

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

122006640 is a wasteful number, since it uses less digits than its factorization.

122006640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72646 (or 72640 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 122006640 is about 11045.6615917744. The cubic root of 122006640 is about 495.9765641025.

Adding to 122006640 its reverse (46600221), we get a palindrome (168606861).

The spelling of 122006640 in words is "one hundred twenty-two million, six thousand, six hundred forty".