43422640 has 20 divisors (see below), whose sum is σ = 100957824. Its totient is φ = 17369024.

The previous prime is 43422611. The next prime is 43422653. The reversal of 43422640 is 4622434.

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 271312 + ... + 271471.

Almost surely, 2^43422640 is an apocalyptic number.

43422640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

43422640 is an abundant number, since it is smaller than the sum of its proper divisors (57535184).

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

43422640 is a wasteful number, since it uses less digits than its factorization.

43422640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542796 (or 542790 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 25.

The square root of 43422640 is about 6589.5857229419. The cubic root of 43422640 is about 351.4838768642.

The spelling of 43422640 in words is "forty-three million, four hundred twenty-two thousand, six hundred forty".