123318390 has 32 divisors (see below), whose sum is σ = 318731616. Its totient is φ = 30355200.

The previous prime is 123318383. The next prime is 123318401. The reversal of 123318390 is 93813321.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 157711 + ... + 158490.

It is an arithmetic number, because the mean of its divisors is an integer number (9960363).

Almost surely, 2^123318390 is an apocalyptic number.

123318390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123318390 is an abundant number, since it is smaller than the sum of its proper divisors (195413226).

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

123318390 is a wasteful number, since it uses less digits than its factorization.

123318390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316224.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 123318390 is about 11104.8813591141. The cubic root of 123318390 is about 497.7477230642.

The spelling of 123318390 in words is "one hundred twenty-three million, three hundred eighteen thousand, three hundred ninety".