40091678 has 16 divisors (see below), whose sum is σ = 69464304. Its totient is φ = 17151360.

The previous prime is 40091671. The next prime is 40091687. The reversal of 40091678 is 87619004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40091671) 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, 53225 + ... + 53972.

It is an arithmetic number, because the mean of its divisors is an integer number (4341519).

Almost surely, 2^40091678 is an apocalyptic number.

40091678 is a deficient number, since it is larger than the sum of its proper divisors (29372626).

40091678 is a wasteful number, since it uses less digits than its factorization.

40091678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107227.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 40091678 is about 6331.7989544836. The cubic root of 40091678 is about 342.2562686013.

The spelling of 40091678 in words is "forty million, ninety-one thousand, six hundred seventy-eight".