123190290 has 48 divisors (see below), whose sum is σ = 327120768. Its totient is φ = 32150688.

The previous prime is 123190271. The next prime is 123190297. The reversal of 123190290 is 92091321.

It is not an unprimeable number, because it can be changed into a prime (123190297) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10332 + ... + 18791.

It is an arithmetic number, because the mean of its divisors is an integer number (6815016).

Almost surely, 2^123190290 is an apocalyptic number.

123190290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123190290 is an abundant number, since it is smaller than the sum of its proper divisors (203930478).

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

123190290 is a wasteful number, since it uses less digits than its factorization.

123190290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29183 (or 29180 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 123190290 is about 11099.1121266523. The cubic root of 123190290 is about 497.5753141369.

The spelling of 123190290 in words is "one hundred twenty-three million, one hundred ninety thousand, two hundred ninety".