43287940 has 24 divisors (see below), whose sum is σ = 92840832. Its totient is φ = 16946400.

The previous prime is 43287931. The next prime is 43287941. The reversal of 43287940 is 4978234.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 43287940.

It is not an unprimeable number, because it can be changed into a prime (43287941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22086 + ... + 23965.

It is an arithmetic number, because the mean of its divisors is an integer number (3868368).

Almost surely, 2^43287940 is an apocalyptic number.

It is an amenable number.

43287940 is an abundant number, since it is smaller than the sum of its proper divisors (49552892).

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

43287940 is a wasteful number, since it uses less digits than its factorization.

43287940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46107 (or 46105 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 43287940 is about 6579.3571114509. The cubic root of 43287940 is about 351.1200580634.

The spelling of 43287940 in words is "forty-three million, two hundred eighty-seven thousand, nine hundred forty".