43421590 has 16 divisors (see below), whose sum is σ = 78336720. Its totient is φ = 17329120.

The previous prime is 43421579. The next prime is 43421597. The reversal of 43421590 is 9512434.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43421597) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100 + ... + 9319.

It is an arithmetic number, because the mean of its divisors is an integer number (4896045).

Almost surely, 2^43421590 is an apocalyptic number.

43421590 is a deficient number, since it is larger than the sum of its proper divisors (34915130).

43421590 is a wasteful number, since it uses less digits than its factorization.

43421590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9887.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 43421590 is about 6589.5060512909. The cubic root of 43421590 is about 351.4810437719.

The spelling of 43421590 in words is "forty-three million, four hundred twenty-one thousand, five hundred ninety".