43121936 has 80 divisors (see below), whose sum is σ = 100493568. Its totient is φ = 17664000.

The previous prime is 43121933. The next prime is 43121951. The reversal of 43121936 is 63912134.

It is a junction number, because it is equal to n+sod(n) for n = 43121899 and 43121908.

It is not an unprimeable number, because it can be changed into a prime (43121933) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107336 + ... + 107736.

Almost surely, 2^43121936 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 43121936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50246784).

43121936 is an abundant number, since it is smaller than the sum of its proper divisors (57371632).

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

43121936 is a wasteful number, since it uses less digits than its factorization.

43121936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480 (or 474 counting only the distinct ones).

The product of its digits is 3888, while the sum is 29.

The square root of 43121936 is about 6566.7294751649. The cubic root of 43121936 is about 350.6706488164.

The spelling of 43121936 in words is "forty-three million, one hundred twenty-one thousand, nine hundred thirty-six".