43990371 has 20 divisors (see below), whose sum is σ = 66960432. Its totient is φ = 28770768.

The previous prime is 43990357. The next prime is 43990381. The reversal of 43990371 is 17309934.

It is not a de Polignac number, because 43990371 - 2⁶ = 43990307 is a prime.

It is not an unprimeable number, because it can be changed into a prime (43990321) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 831 + ... + 9416.

Almost surely, 2^43990371 is an apocalyptic number.

43990371 is a deficient number, since it is larger than the sum of its proper divisors (22970061).

43990371 is a wasteful number, since it uses less digits than its factorization.

43990371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10312 (or 10303 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 36.

The square root of 43990371 is about 6632.5237278128. The cubic root of 43990371 is about 353.0090788325.

The spelling of 43990371 in words is "forty-three million, nine hundred ninety thousand, three hundred seventy-one".