122222780 has 12 divisors (see below), whose sum is σ = 256667880. Its totient is φ = 48889104.

The previous prime is 122222777. The next prime is 122222797. The reversal of 122222780 is 87222221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3055550 + ... + 3055589.

It is an arithmetic number, because the mean of its divisors is an integer number (21388990).

Almost surely, 2^122222780 is an apocalyptic number.

122222780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

122222780 is an abundant number, since it is smaller than the sum of its proper divisors (134445100).

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

122222780 is a wasteful number, since it uses less digits than its factorization.

122222780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6111148 (or 6111146 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 122222780 is about 11055.4411942717. The cubic root of 122222780 is about 496.2692725798.

The spelling of 122222780 in words is "one hundred twenty-two million, two hundred twenty-two thousand, seven hundred eighty".