122647980 has 144 divisors (see below), whose sum is σ = 430345440. Its totient is φ = 25869312.

The previous prime is 122647969. The next prime is 122648011. The reversal of 122647980 is 89746221.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 36616 + ... + 39824.

It is an arithmetic number, because the mean of its divisors is an integer number (2988510).

Almost surely, 2^122647980 is an apocalyptic number.

122647980 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 122647980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (215172720).

122647980 is an abundant number, since it is smaller than the sum of its proper divisors (307697460).

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

122647980 is a wasteful number, since it uses less digits than its factorization.

122647980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3248 (or 3239 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 122647980 is about 11074.6548478948. The cubic root of 122647980 is about 496.8440957797.

The spelling of 122647980 in words is "one hundred twenty-two million, six hundred forty-seven thousand, nine hundred eighty".