43964 has 12 divisors (see below), whose sum is σ = 79800. Its totient is φ = 21168.

The previous prime is 43963. The next prime is 43969. The reversal of 43964 is 46934.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43961) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74 + ... + 305.

It is an arithmetic number, because the mean of its divisors is an integer number (6650).

2⁴³⁹⁶⁴ is an apocalyptic number.

It is an amenable number.

43964 is a deficient number, since it is larger than the sum of its proper divisors (35836).

43964 is a wasteful number, since it uses less digits than its factorization.

43964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412 (or 410 counting only the distinct ones).

The product of its digits is 2592, while the sum is 26.

The square root of 43964 is about 209.6759404414. The cubic root of 43964 is about 35.2938525035.

The spelling of 43964 in words is "forty-three thousand, nine hundred sixty-four".