43661982 has 32 divisors (see below), whose sum is σ = 107476992. Its totient is φ = 11515104.

The previous prime is 43661963. The next prime is 43662011. The reversal of 43661982 is 28916634.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 43661982.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39438 + ... + 40529.

It is an arithmetic number, because the mean of its divisors is an integer number (3358656).

Almost surely, 2^43661982 is an apocalyptic number.

43661982 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

43661982 is an abundant number, since it is smaller than the sum of its proper divisors (63815010).

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

43661982 is a wasteful number, since it uses less digits than its factorization.

43661982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79992.

The product of its digits is 62208, while the sum is 39.

The square root of 43661982 is about 6607.7213924317. The cubic root of 43661982 is about 352.1284773349.

The spelling of 43661982 in words is "forty-three million, six hundred sixty-one thousand, nine hundred eighty-two".