122540390 has 32 divisors (see below), whose sum is σ = 258237504. Its totient is φ = 40988160.

The previous prime is 122540351. The next prime is 122540441. The reversal of 122540390 is 93045221.

It is a super-2 number, since 2×122540390² = 30032294362704200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18479 + ... + 24218.

It is an arithmetic number, because the mean of its divisors is an integer number (8069922).

Almost surely, 2^122540390 is an apocalyptic number.

122540390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

122540390 is an abundant number, since it is smaller than the sum of its proper divisors (135697114).

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

122540390 is a wasteful number, since it uses less digits than its factorization.

122540390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42752.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 122540390 is about 11069.7962944220. The cubic root of 122540390 is about 496.6987717537.

The spelling of 122540390 in words is "one hundred twenty-two million, five hundred forty thousand, three hundred ninety".