40639371 has 8 divisors (see below), whose sum is σ = 54712320. Its totient is φ = 26829672.

The previous prime is 40639363. The next prime is 40639381. The reversal of 40639371 is 17393604.

40639371 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40639371 - 2³ = 40639363 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40639301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65451 + ... + 66068.

It is an arithmetic number, because the mean of its divisors is an integer number (6839040).

Almost surely, 2^40639371 is an apocalyptic number.

40639371 is a deficient number, since it is larger than the sum of its proper divisors (14072949).

40639371 is a wasteful number, since it uses less digits than its factorization.

40639371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131625.

The product of its (nonzero) digits is 13608, while the sum is 33.

The square root of 40639371 is about 6374.9016463001. The cubic root of 40639371 is about 343.8077476096.

The spelling of 40639371 in words is "forty million, six hundred thirty-nine thousand, three hundred seventy-one".