43991187960 has 64 divisors (see below), whose sum is σ = 132018112800. Its totient is φ = 11727023616.

The previous prime is 43991187953. The next prime is 43991187967. The reversal of 43991187960 is 6978119934.

It is an interprime number because it is at equal distance from previous prime (43991187953) and next prime (43991187967).

It is a self number, because there is not a number n which added to its sum of digits gives 43991187960.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43991187967) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 304086 + ... + 424794.

Almost surely, 2^43991187960 is an apocalyptic number.

43991187960 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

43991187960 is an abundant number, since it is smaller than the sum of its proper divisors (88026924840).

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

43991187960 is a wasteful number, since it uses less digits than its factorization.

43991187960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123760 (or 123756 counting only the distinct ones).

The product of its (nonzero) digits is 2939328, while the sum is 57.

The spelling of 43991187960 in words is "forty-three billion, nine hundred ninety-one million, one hundred eighty-seven thousand, nine hundred sixty".