43940871 has 12 divisors (see below), whose sum is σ = 68352648. Its totient is φ = 27040464.

The previous prime is 43940861. The next prime is 43940893. The reversal of 43940871 is 17804934.

43940871 = 164² + 165² + ... + 514².

It is a happy number.

It is not a de Polignac number, because 43940871 - 2⁵ = 43940839 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43940821) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 187665 + ... + 187898.

It is an arithmetic number, because the mean of its divisors is an integer number (5696054).

Almost surely, 2^43940871 is an apocalyptic number.

43940871 is a deficient number, since it is larger than the sum of its proper divisors (24411777).

43940871 is a wasteful number, since it uses less digits than its factorization.

43940871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375582 (or 375579 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 43940871 is about 6628.7910662503. The cubic root of 43940871 is about 352.8766217571.

The spelling of 43940871 in words is "forty-three million, nine hundred forty thousand, eight hundred seventy-one".