40406943 has 8 divisors (see below), whose sum is σ = 57045168. Its totient is φ = 25353344.

The previous prime is 40406911. The next prime is 40406953. The reversal of 40406943 is 34960404.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40406943 - 2⁵ = 40406911 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40406943.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40406903) 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, 396096 + ... + 396197.

It is an arithmetic number, because the mean of its divisors is an integer number (7130646).

Almost surely, 2^40406943 is an apocalyptic number.

40406943 is a deficient number, since it is larger than the sum of its proper divisors (16638225).

40406943 is a wasteful number, since it uses less digits than its factorization.

40406943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 792313.

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 40406943 is about 6356.6455776612. The cubic root of 40406943 is about 343.1510496445.

The spelling of 40406943 in words is "forty million, four hundred six thousand, nine hundred forty-three".