43400040400 has 60 divisors (see below), whose sum is σ = 105588529600. Its totient is φ = 17140256640.

The previous prime is 43400040391. The next prime is 43400040403. The reversal of 43400040400 is 404000434.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43400040403) 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, 655110 + ... + 718309.

Almost surely, 2^43400040400 is an apocalyptic number.

43400040400 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

43400040400 is an abundant number, since it is smaller than the sum of its proper divisors (62188489200).

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

43400040400 is a wasteful number, since it uses less digits than its factorization.

43400040400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1373516 (or 1373505 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 19.

Adding to 43400040400 its reverse (404000434), we get a palindrome (43804040834).

The spelling of 43400040400 in words is "forty-three billion, four hundred million, forty thousand, four hundred".