12399400 has 96 divisors (see below), whose sum is σ = 32810400. Its totient is φ = 4320000.

The previous prime is 12399397. The next prime is 12399407. The reversal of 12399400 is 499321.

It is a happy number.

12399400 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (12399407) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 49275 + ... + 49525.

It is an arithmetic number, because the mean of its divisors is an integer number (341775).

Almost surely, 2^12399400 is an apocalyptic number.

12399400 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 12399400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16405200).

12399400 is an abundant number, since it is smaller than the sum of its proper divisors (20411000).

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

12399400 is a wasteful number, since it uses less digits than its factorization.

12399400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299 (or 290 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 12399400 is about 3521.2781770261. The cubic root of 12399400 is about 231.4551721842.

It can be divided in two parts, 1 and 2399400, that added together give a square (2399401 = 1549²).

The spelling of 12399400 in words is "twelve million, three hundred ninety-nine thousand, four hundred".