122686620 has 96 divisors (see below), whose sum is σ = 415715328. Its totient is φ = 26391552.

The previous prime is 122686549. The next prime is 122686621. The reversal of 122686620 is 26686221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122686621) 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 31 ways as a sum of consecutive naturals, for example, 1452 + ... + 15731.

It is an arithmetic number, because the mean of its divisors is an integer number (4330368).

Almost surely, 2^122686620 is an apocalyptic number.

122686620 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 122686620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (207857664).

122686620 is an abundant number, since it is smaller than the sum of its proper divisors (293028708).

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

122686620 is a wasteful number, since it uses less digits than its factorization.

122686620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17219 (or 17217 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 122686620 is about 11076.3992344083. The cubic root of 122686620 is about 496.8962668798.

The spelling of 122686620 in words is "one hundred twenty-two million, six hundred eighty-six thousand, six hundred twenty".