40680591 has 32 divisors (see below), whose sum is σ = 65149440. Its totient is φ = 22087296.

The previous prime is 40680581. The next prime is 40680599. The reversal of 40680591 is 19508604.

It is not a de Polignac number, because 40680591 - 2¹³ = 40672399 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40680599) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40305 + ... + 41301.

It is an arithmetic number, because the mean of its divisors is an integer number (2035920).

Almost surely, 2^40680591 is an apocalyptic number.

40680591 is a deficient number, since it is larger than the sum of its proper divisors (24468849).

40680591 is a wasteful number, since it uses less digits than its factorization.

40680591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1103.

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

The square root of 40680591 is about 6378.1338179753. The cubic root of 40680591 is about 343.9239482814.

The spelling of 40680591 in words is "forty million, six hundred eighty thousand, five hundred ninety-one".