123003900 has 72 divisors (see below), whose sum is σ = 395443440. Its totient is φ = 32800320.

The previous prime is 123003899. The next prime is 123003949. The reversal of 123003900 is 9300321.

It is a Harshad number since it is a multiple of its sum of digits (18).

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 23 ways as a sum of consecutive naturals, for example, 20079 + ... + 25478.

It is an arithmetic number, because the mean of its divisors is an integer number (5492270).

Almost surely, 2^123003900 is an apocalyptic number.

123003900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123003900 is an abundant number, since it is smaller than the sum of its proper divisors (272439540).

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

123003900 is a wasteful number, since it uses less digits than its factorization.

123003900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45580 (or 45567 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

The square root of 123003900 is about 11090.7123305945. The cubic root of 123003900 is about 497.3242394882.

The spelling of 123003900 in words is "one hundred twenty-three million, three thousand, nine hundred".