40068915 has 16 divisors (see below), whose sum is σ = 67881888. Its totient is φ = 20112896.

The previous prime is 40068913. The next prime is 40068937. The reversal of 40068915 is 51986004.

It is a cyclic number.

It is not a de Polignac number, because 40068915 - 2¹ = 40068913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40068913) 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, 78312 + ... + 78821.

It is an arithmetic number, because the mean of its divisors is an integer number (4242618).

Almost surely, 2^40068915 is an apocalyptic number.

40068915 is a deficient number, since it is larger than the sum of its proper divisors (27812973).

40068915 is a wasteful number, since it uses less digits than its factorization.

40068915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157158.

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 40068915 is about 6330.0011848340. The cubic root of 40068915 is about 342.1914816367.

It can be divided in two parts, 4006 and 8915, that added together give a palindrome (12921).

The spelling of 40068915 in words is "forty million, sixty-eight thousand, nine hundred fifteen".