122715780 has 72 divisors (see below), whose sum is σ = 377702976. Its totient is φ = 29747520.

The previous prime is 122715773. The next prime is 122715799. The reversal of 122715780 is 87517221.

It is a super-2 number, since 2×122715780² = 30118325322016800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

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 23 ways as a sum of consecutive naturals, for example, 1192 + ... + 15711.

Almost surely, 2^122715780 is an apocalyptic number.

122715780 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 122715780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (188851488).

122715780 is an abundant number, since it is smaller than the sum of its proper divisors (254987196).

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

122715780 is a wasteful number, since it uses less digits than its factorization.

122715780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16937 (or 16924 counting only the distinct ones).

The product of its (nonzero) digits is 7840, while the sum is 33.

The square root of 122715780 is about 11077.7154684529. The cubic root of 122715780 is about 496.9356309858.

The spelling of 122715780 in words is "one hundred twenty-two million, seven hundred fifteen thousand, seven hundred eighty".