40680439 has 4 divisors (see below), whose sum is σ = 43073424. Its totient is φ = 38287456.

The previous prime is 40680421. The next prime is 40680449. The reversal of 40680439 is 93408604.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40680439 - 2⁵ = 40680407 is a prime.

It is a super-3 number, since 3×40680439³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40680449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1196467 + ... + 1196500.

It is an arithmetic number, because the mean of its divisors is an integer number (10768356).

Almost surely, 2^40680439 is an apocalyptic number.

40680439 is a deficient number, since it is larger than the sum of its proper divisors (2392985).

40680439 is a wasteful number, since it uses less digits than its factorization.

40680439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2392984.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 40680439 is about 6378.1219022530. The cubic root of 40680439 is about 343.9235199321.

The spelling of 40680439 in words is "forty million, six hundred eighty thousand, four hundred thirty-nine".