123130290 has 16 divisors (see below), whose sum is σ = 295512768. Its totient is φ = 32834736.

The previous prime is 123130243. The next prime is 123130327. The reversal of 123130290 is 92031321.

It is a happy number.

It is a super-2 number, since 2×123130290² = 30322136630968200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2052142 + ... + 2052201.

It is an arithmetic number, because the mean of its divisors is an integer number (18469548).

Almost surely, 2^123130290 is an apocalyptic number.

123130290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123130290 is an abundant number, since it is smaller than the sum of its proper divisors (172382478).

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

123130290 is a wasteful number, since it uses less digits than its factorization.

123130290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4104353.

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 123130290 is about 11096.4088785517. The cubic root of 123130290 is about 497.4945194383.

The spelling of 123130290 in words is "one hundred twenty-three million, one hundred thirty thousand, two hundred ninety".