40438717 has 8 divisors (see below), whose sum is σ = 44184960. Its totient is φ = 36704160.

The previous prime is 40438709. The next prime is 40438813. The reversal of 40438717 is 71783404.

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 40438717 - 2³ = 40438709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40430717) 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, 5353 + ... + 10465.

It is an arithmetic number, because the mean of its divisors is an integer number (5523120).

Almost surely, 2^40438717 is an apocalyptic number.

It is an amenable number.

40438717 is a deficient number, since it is larger than the sum of its proper divisors (3746243).

40438717 is a wasteful number, since it uses less digits than its factorization.

40438717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5843.

The product of its (nonzero) digits is 18816, while the sum is 34.

The square root of 40438717 is about 6359.1443606825. The cubic root of 40438717 is about 343.2409716889.

It can be divided in two parts, 404387 and 17, that added together give a palindrome (404404).

The spelling of 40438717 in words is "forty million, four hundred thirty-eight thousand, seven hundred seventeen".