43400421424 has 80 divisors (see below), whose sum is σ = 89631450720. Its totient is φ = 20321208320.

The previous prime is 43400421413. The next prime is 43400421451. The reversal of 43400421424 is 42412400434.

It is a junction number, because it is equal to n+sod(n) for n = 43400421392 and 43400421401.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3284559 + ... + 3297745.

It is an arithmetic number, because the mean of its divisors is an integer number (1120393134).

Almost surely, 2^43400421424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 43400421424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44815725360).

43400421424 is an abundant number, since it is smaller than the sum of its proper divisors (46231029296).

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

43400421424 is a wasteful number, since it uses less digits than its factorization.

43400421424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13438 (or 13432 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 28.

Adding to 43400421424 its reverse (42412400434), we get a palindrome (85812821858).

The spelling of 43400421424 in words is "forty-three billion, four hundred million, four hundred twenty-one thousand, four hundred twenty-four".