40239693 has 16 divisors (see below), whose sum is σ = 64200640. Its totient is φ = 24762672.

The previous prime is 40239679. The next prime is 40239709. The reversal of 40239693 is 39693204.

It is a happy number.

It is not a de Polignac number, because 40239693 - 2⁹ = 40239181 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 (40239293) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56971 + ... + 57672.

It is an arithmetic number, because the mean of its divisors is an integer number (4012540).

Almost surely, 2^40239693 is an apocalyptic number.

It is an amenable number.

40239693 is a deficient number, since it is larger than the sum of its proper divisors (23960947).

40239693 is a wasteful number, since it uses less digits than its factorization.

40239693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114665 (or 114659 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 36.

The square root of 40239693 is about 6343.4764128197. The cubic root of 40239693 is about 342.6769448175.

The spelling of 40239693 in words is "forty million, two hundred thirty-nine thousand, six hundred ninety-three".