43399964 has 24 divisors (see below), whose sum is σ = 78650880. Its totient is φ = 20938176.

The previous prime is 43399931. The next prime is 43399973. The reversal of 43399964 is 46999334.

It is a happy number.

43399964 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 17642 + ... + 19950.

It is an arithmetic number, because the mean of its divisors is an integer number (3277120).

Almost surely, 2^43399964 is an apocalyptic number.

It is an amenable number.

43399964 is a deficient number, since it is larger than the sum of its proper divisors (35250916).

43399964 is a wasteful number, since it uses less digits than its factorization.

43399964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2477 (or 2475 counting only the distinct ones).

The product of its digits is 629856, while the sum is 47.

The square root of 43399964 is about 6587.8649045043. The cubic root of 43399964 is about 351.4226827023.

The spelling of 43399964 in words is "forty-three million, three hundred ninety-nine thousand, nine hundred sixty-four".