123403400 has 48 divisors (see below), whose sum is σ = 289916340. Its totient is φ = 48844800.

The previous prime is 123403387. The next prime is 123403411. The reversal of 123403400 is 4304321.

It can be written as a sum of positive squares in 6 ways, for example, as 26853124 + 96550276 = 5182^2 + 9826^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16220 + ... + 22580.

Almost surely, 2^123403400 is an apocalyptic number.

123403400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123403400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (144958170).

123403400 is an abundant number, since it is smaller than the sum of its proper divisors (166512940).

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

123403400 is a wasteful number, since it uses less digits than its factorization.

123403400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6474 (or 6465 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 123403400 is about 11108.7082957471. The cubic root of 123403400 is about 497.8620715531.

Adding to 123403400 its reverse (4304321), we get a palindrome (127707721).

The spelling of 123403400 in words is "one hundred twenty-three million, four hundred three thousand, four hundred".