40718639 has 8 divisors (see below), whose sum is σ = 45363360. Its totient is φ = 36290016.

The previous prime is 40718633. The next prime is 40718651. The reversal of 40718639 is 93681704.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40718639 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 (40718633) 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, 53627 + ... + 54380.

It is an arithmetic number, because the mean of its divisors is an integer number (5670420).

Almost surely, 2^40718639 is an apocalyptic number.

40718639 is a deficient number, since it is larger than the sum of its proper divisors (4644721).

40718639 is a wasteful number, since it uses less digits than its factorization.

40718639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108049.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 40718639 is about 6381.1158115176. The cubic root of 40718639 is about 344.0311373248.

The spelling of 40718639 in words is "forty million, seven hundred eighteen thousand, six hundred thirty-nine".