123381900 has 72 divisors (see below), whose sum is σ = 396658640. Its totient is φ = 32901120.

The previous prime is 123381893. The next prime is 123381911. The reversal of 123381900 is 9183321.

It is a super-2 number, since 2×123381900² = 30446186495220000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 20149 + ... + 25548.

Almost surely, 2^123381900 is an apocalyptic number.

123381900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123381900 is an abundant number, since it is smaller than the sum of its proper divisors (273276740).

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

123381900 is a wasteful number, since it uses less digits than its factorization.

123381900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45720 (or 45707 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 123381900 is about 11107.7405443231. The cubic root of 123381900 is about 497.8331564767.

The spelling of 123381900 in words is "one hundred twenty-three million, three hundred eighty-one thousand, nine hundred".