123904590 has 16 divisors (see below), whose sum is σ = 297371088. Its totient is φ = 33041216.

The previous prime is 123904553. The next prime is 123904591. The reversal of 123904590 is 95409321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123904591) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 2065047 + ... + 2065106.

It is an arithmetic number, because the mean of its divisors is an integer number (18585693).

Almost surely, 2^123904590 is an apocalyptic number.

123904590 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123904590 is an abundant number, since it is smaller than the sum of its proper divisors (173466498).

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

123904590 is a wasteful number, since it uses less digits than its factorization.

123904590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4130163.

The product of its (nonzero) digits is 9720, while the sum is 33.

The square root of 123904590 is about 11131.2438658040. The cubic root of 123904590 is about 498.5351660472.

The spelling of 123904590 in words is "one hundred twenty-three million, nine hundred four thousand, five hundred ninety".