123193830 has 32 divisors (see below), whose sum is σ = 297211104. Its totient is φ = 32679936.

The previous prime is 123193817. The next prime is 123193867. The reversal of 123193830 is 38391321.

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 pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4849 + ... + 16428.

It is an arithmetic number, because the mean of its divisors is an integer number (9287847).

Almost surely, 2^123193830 is an apocalyptic number.

123193830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123193830 is an abundant number, since it is smaller than the sum of its proper divisors (174017274).

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

123193830 is a wasteful number, since it uses less digits than its factorization.

123193830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21480.

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

The square root of 123193830 is about 11099.2715977221. The cubic root of 123193830 is about 497.5800802045.

The spelling of 123193830 in words is "one hundred twenty-three million, one hundred ninety-three thousand, eight hundred thirty".