123031400 has 48 divisors (see below), whose sum is σ = 287258400. Its totient is φ = 49004480.

The previous prime is 123031379. The next prime is 123031409. The reversal of 123031400 is 4130321.

It is a zygodrome in base 5.

It is not an unprimeable number, because it can be changed into a prime (123031409) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 51431 + ... + 53769.

It is an arithmetic number, because the mean of its divisors is an integer number (5984550).

Almost surely, 2^123031400 is an apocalyptic number.

123031400 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 123031400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (143629200).

123031400 is an abundant number, since it is smaller than the sum of its proper divisors (164227000).

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

123031400 is a wasteful number, since it uses less digits than its factorization.

123031400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2618 (or 2609 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 123031400 is about 11091.9520374008. The cubic root of 123031400 is about 497.3612990110.

Adding to 123031400 its reverse (4130321), we get a palindrome (127161721).

The spelling of 123031400 in words is "one hundred twenty-three million, thirty-one thousand, four hundred".