43491996 has 36 divisors (see below), whose sum is σ = 113731800. Its totient is φ = 13997088.

The previous prime is 43491991. The next prime is 43491997. The reversal of 43491996 is 69919434.

43491996 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 (36).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43491991) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 19786 + ... + 21873.

Almost surely, 2^43491996 is an apocalyptic number.

It is an amenable number.

43491996 is an abundant number, since it is smaller than the sum of its proper divisors (70239804).

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

43491996 is a wasteful number, since it uses less digits than its factorization.

43491996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41698 (or 41693 counting only the distinct ones).

The product of its digits is 209952, while the sum is 45.

The square root of 43491996 is about 6594.8461695479. The cubic root of 43491996 is about 351.6709110045.

The spelling of 43491996 in words is "forty-three million, four hundred ninety-one thousand, nine hundred ninety-six".