122173640 has 32 divisors (see below), whose sum is σ = 277621560. Its totient is φ = 48384000.

The previous prime is 122173627. The next prime is 122173643. The reversal of 122173640 is 46371221.

It can be written as a sum of positive squares in 4 ways, for example, as 106791556 + 15382084 = 10334^2 + 3922^2 .

It is not an unprimeable number, because it can be changed into a prime (122173643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11081 + ... + 19160.

Almost surely, 2^122173640 is an apocalyptic number.

122173640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

122173640 is an abundant number, since it is smaller than the sum of its proper divisors (155447920).

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

122173640 is a wasteful number, since it uses less digits than its factorization.

122173640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30353 (or 30349 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 122173640 is about 11053.2185357931. The cubic root of 122173640 is about 496.2027548624.

The spelling of 122173640 in words is "one hundred twenty-two million, one hundred seventy-three thousand, six hundred forty".