40091706 has 16 divisors (see below), whose sum is σ = 89092800. Its totient is φ = 13363884.

The previous prime is 40091687. The next prime is 40091707. The reversal of 40091706 is 60719004.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 40091706.

It is not an unprimeable number, because it can be changed into a prime (40091707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 371166 + ... + 371273.

It is an arithmetic number, because the mean of its divisors is an integer number (5568300).

Almost surely, 2^40091706 is an apocalyptic number.

40091706 is an abundant number, since it is smaller than the sum of its proper divisors (49001094).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40091706 is a wasteful number, since it uses less digits than its factorization.

40091706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 742450 (or 742444 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 40091706 is about 6331.8011655452. The cubic root of 40091706 is about 342.2563482785.

The spelling of 40091706 in words is "forty million, ninety-one thousand, seven hundred six".