43945164 has 18 divisors (see below), whose sum is σ = 111083700. Its totient is φ = 14648376.

The previous prime is 43945151. The next prime is 43945199. The reversal of 43945164 is 46154934.

43945164 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 1220699 = 43945164 / (4 + 3 + 9 + 4 + 5 + 1 + 6 + 4).

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 5 ways as a sum of consecutive naturals, for example, 610314 + ... + 610385.

Almost surely, 2^43945164 is an apocalyptic number.

It is an amenable number.

43945164 is an abundant number, since it is smaller than the sum of its proper divisors (67138536).

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

43945164 is a wasteful number, since it uses less digits than its factorization.

43945164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1220709 (or 1220704 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 43945164 is about 6629.1148730430. The cubic root of 43945164 is about 352.8881133363. Note that the first 3 decimals are identical.

The spelling of 43945164 in words is "forty-three million, nine hundred forty-five thousand, one hundred sixty-four".