122889680 has 20 divisors (see below), whose sum is σ = 285718692. Its totient is φ = 49155840.

The previous prime is 122889677. The next prime is 122889707. The reversal of 122889680 is 86988221.

It can be written as a sum of positive squares in 2 ways, for example, as 15808576 + 107081104 = 3976^2 + 10348^2 .

It is a tau number, because it is divible by the number of its divisors (20).

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 3 ways as a sum of consecutive naturals, for example, 767981 + ... + 768140.

Almost surely, 2^122889680 is an apocalyptic number.

122889680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

122889680 is an abundant number, since it is smaller than the sum of its proper divisors (162829012).

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

122889680 is a wasteful number, since it uses less digits than its factorization.

122889680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1536134 (or 1536128 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 44.

The square root of 122889680 is about 11085.5617809834. The cubic root of 122889680 is about 497.1702553020.

The spelling of 122889680 in words is "one hundred twenty-two million, eight hundred eighty-nine thousand, six hundred eighty".