40321684 has 12 divisors (see below), whose sum is σ = 75990964. Its totient is φ = 18609984.

The previous prime is 40321663. The next prime is 40321709. The reversal of 40321684 is 48612304.

It can be written as a sum of positive squares in 2 ways, for example, as 12759184 + 27562500 = 3572^2 + 5250^2 .

It is a congruent number.

It is an unprimeable number.

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, 387657 + ... + 387760.

Almost surely, 2^40321684 is an apocalyptic number.

It is an amenable number.

40321684 is a deficient number, since it is larger than the sum of its proper divisors (35669280).

40321684 is a wasteful number, since it uses less digits than its factorization.

40321684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 775434 (or 775432 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 40321684 is about 6349.9357477064. The cubic root of 40321684 is about 342.9095291316.

Adding to 40321684 its reverse (48612304), we get a palindrome (88933988).

The spelling of 40321684 in words is "forty million, three hundred twenty-one thousand, six hundred eighty-four".