43963964 has 12 divisors (see below), whose sum is σ = 83931288. Its totient is φ = 19983600.

The previous prime is 43963963. The next prime is 43963973. The reversal of 43963964 is 46936934.

It is a Harshad number since it is a multiple of its sum of digits (44), and also a Moran number because the ratio is a prime number: 999181 = 43963964 / (4 + 3 + 9 + 6 + 3 + 9 + 6 + 4).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43963963) 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, 499547 + ... + 499634.

It is an arithmetic number, because the mean of its divisors is an integer number (6994274).

Almost surely, 2^43963964 is an apocalyptic number.

43963964 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

43963964 is a deficient number, since it is larger than the sum of its proper divisors (39967324).

43963964 is a wasteful number, since it uses less digits than its factorization.

43963964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 999196 (or 999194 counting only the distinct ones).

The product of its digits is 419904, while the sum is 44.

The square root of 43963964 is about 6630.5327086140. The cubic root of 43963964 is about 352.9384286997.

The spelling of 43963964 in words is "forty-three million, nine hundred sixty-three thousand, nine hundred sixty-four".