122188656 has 80 divisors (see below), whose sum is σ = 336969504. Its totient is φ = 38019072.

The previous prime is 122188597. The next prime is 122188663. The reversal of 122188656 is 656881221.

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, 111246 + ... + 112338.

Almost surely, 2^122188656 is an apocalyptic number.

122188656 is a gapful number since it is divisible by the number (16) 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 122188656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (168484752).

122188656 is an abundant number, since it is smaller than the sum of its proper divisors (214780848).

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

122188656 is a wasteful number, since it uses less digits than its factorization.

122188656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1258 (or 1252 counting only the distinct ones).

The product of its digits is 46080, while the sum is 39.

The square root of 122188656 is about 11053.8977740886. The cubic root of 122188656 is about 496.2230829663.

The spelling of 122188656 in words is "one hundred twenty-two million, one hundred eighty-eight thousand, six hundred fifty-six".