43621406 has 16 divisors (see below), whose sum is σ = 66653280. Its totient is φ = 21406560.

The previous prime is 43621399. The next prime is 43621429. The reversal of 43621406 is 60412634.

43621406 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×43621406² = 3805654122833672, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38780 + ... + 39888.

It is an arithmetic number, because the mean of its divisors is an integer number (4165830).

Almost surely, 2^43621406 is an apocalyptic number.

43621406 is a deficient number, since it is larger than the sum of its proper divisors (23031874).

43621406 is a wasteful number, since it uses less digits than its factorization.

43621406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1459.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 43621406 is about 6604.6503313953. The cubic root of 43621406 is about 352.0193633890.

The spelling of 43621406 in words is "forty-three million, six hundred twenty-one thousand, four hundred six".