40305679 has 4 divisors (see below), whose sum is σ = 41695560. Its totient is φ = 38915800.

The previous prime is 40305667. The next prime is 40305701. The reversal of 40305679 is 97650304.

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 40305679 - 2⁵ = 40305647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40305619) 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 3 ways as a sum of consecutive naturals, for example, 694897 + ... + 694954.

It is an arithmetic number, because the mean of its divisors is an integer number (10423890).

Almost surely, 2^40305679 is an apocalyptic number.

40305679 is a deficient number, since it is larger than the sum of its proper divisors (1389881).

40305679 is a wasteful number, since it uses less digits than its factorization.

40305679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1389880.

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 40305679 is about 6348.6753736508. The cubic root of 40305679 is about 342.8641524443.

The spelling of 40305679 in words is "forty million, three hundred five thousand, six hundred seventy-nine".