40671778 has 16 divisors (see below), whose sum is σ = 69903360. Its totient is φ = 17385696.

The previous prime is 40671773. The next prime is 40671793. The reversal of 40671778 is 87717604.

It is a self number, because there is not a number n which added to its sum of digits gives 40671778.

It is not an unprimeable number, because it can be changed into a prime (40671773) 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, 2175 + ... + 9277.

It is an arithmetic number, because the mean of its divisors is an integer number (4368960).

Almost surely, 2^40671778 is an apocalyptic number.

40671778 is a deficient number, since it is larger than the sum of its proper divisors (29231582).

40671778 is a wasteful number, since it uses less digits than its factorization.

40671778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7521.

The product of its (nonzero) digits is 65856, while the sum is 40.

The square root of 40671778 is about 6377.4429044877. The cubic root of 40671778 is about 343.8991107149.

The spelling of 40671778 in words is "forty million, six hundred seventy-one thousand, seven hundred seventy-eight".