122258890 has 32 divisors (see below), whose sum is σ = 242516736. Its totient is φ = 44089920.

The previous prime is 122258887. The next prime is 122258923. The reversal of 122258890 is 98852221.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 15 ways as a sum of consecutive naturals, for example, 5346 + ... + 16525.

It is an arithmetic number, because the mean of its divisors is an integer number (7578648).

Almost surely, 2^122258890 is an apocalyptic number.

122258890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

122258890 is a deficient number, since it is larger than the sum of its proper divisors (120257846).

122258890 is a wasteful number, since it uses less digits than its factorization.

122258890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21934.

The product of its (nonzero) digits is 23040, while the sum is 37.

The square root of 122258890 is about 11057.0742061361. The cubic root of 122258890 is about 496.3181410447.

It can be divided in two parts, 12225 and 8890, that added together give a triangular number (21115 = T₂₀₅).

The spelling of 122258890 in words is "one hundred twenty-two million, two hundred fifty-eight thousand, eight hundred ninety".