40007943 has 12 divisors (see below), whose sum is σ = 57844488. Its totient is φ = 26646480.

The previous prime is 40007917. The next prime is 40007963. The reversal of 40007943 is 34970004.

It is not a de Polignac number, because 40007943 - 2¹⁰ = 40006919 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40007963) 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, 15613 + ... + 17993.

It is an arithmetic number, because the mean of its divisors is an integer number (4820374).

Almost surely, 2^40007943 is an apocalyptic number.

40007943 is a deficient number, since it is larger than the sum of its proper divisors (17836545).

40007943 is a wasteful number, since it uses less digits than its factorization.

40007943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4254 (or 4251 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 40007943 is about 6325.1832384525. The cubic root of 40007943 is about 342.0178250687.

Adding to 40007943 its reverse (34970004), we get a palindrome (74977947).

The spelling of 40007943 in words is "forty million, seven thousand, nine hundred forty-three".