2043406400 has 168 divisors, whose sum is σ = 5902854336. Its totient is φ = 681523200.

The previous prime is 2043406367. The next prime is 2043406403. The reversal of 2043406400 is 46043402.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (2043406403) 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, 411935 + ... + 416865.

Almost surely, 2^2043406400 is an apocalyptic number.

2043406400 is a gapful number since it is divisible by the number (20) 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 2043406400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2951427168).

2043406400 is an abundant number, since it is smaller than the sum of its proper divisors (3859447936).

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

2043406400 is a wasteful number, since it uses less digits than its factorization.

2043406400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4997 (or 4982 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 2043406400 is about 45204.0529156402. The cubic root of 2043406400 is about 1268.9706665616.

Adding to 2043406400 its reverse (46043402), we get a palindrome (2089449802).

The spelling of 2043406400 in words is "two billion, forty-three million, four hundred six thousand, four hundred".