122722290 has 48 divisors (see below), whose sum is σ = 330902208. Its totient is φ = 32725296.

The previous prime is 122722277. The next prime is 122722297. The reversal of 122722290 is 92227221.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (122722297) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22822 + ... + 27681.

It is an arithmetic number, because the mean of its divisors is an integer number (6893796).

Almost surely, 2^122722290 is an apocalyptic number.

122722290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

122722290 is an abundant number, since it is smaller than the sum of its proper divisors (208179918).

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

122722290 is an equidigital number, since it uses as much as digits as its factorization.

122722290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50525 (or 50513 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 122722290 is about 11078.0092977033. The cubic root of 122722290 is about 496.9444182114.

The spelling of 122722290 in words is "one hundred twenty-two million, seven hundred twenty-two thousand, two hundred ninety".