16640324 has 12 divisors (see below), whose sum is σ = 29160684. Its totient is φ = 8308704.

The previous prime is 16640317. The next prime is 16640329. The reversal of 16640324 is 42304661.

It can be written as a sum of positive squares in 2 ways, for example, as 2502724 + 14137600 = 1582^2 + 3760^2 .

It is a junction number, because it is equal to n+sod(n) for n = 16640293 and 16640302.

It is not an unprimeable number, because it can be changed into a prime (16640329) 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, 974 + ... + 5850.

It is an arithmetic number, because the mean of its divisors is an integer number (2430057).

Almost surely, 2^16640324 is an apocalyptic number.

It is an amenable number.

16640324 is a deficient number, since it is larger than the sum of its proper divisors (12520360).

16640324 is a wasteful number, since it uses less digits than its factorization.

16640324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5734 (or 5732 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 16640324 is about 4079.2553241983. The cubic root of 16640324 is about 255.3018289400.

Adding to 16640324 its reverse (42304661), we get a palindrome (58944985).

The spelling of 16640324 in words is "sixteen million, six hundred forty thousand, three hundred twenty-four".