16640336 has 10 divisors (see below), whose sum is σ = 32240682. Its totient is φ = 8320160.

The previous prime is 16640329. The next prime is 16640347. The reversal of 16640336 is 63304661.

It can be written as a sum of positive squares in only one way, i.e., 12559936 + 4080400 = 3544^2 + 2020^2 .

It is a junction number, because it is equal to n+sod(n) for n = 16640299 and 16640308.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 519995 + ... + 520026.

Almost surely, 2^16640336 is an apocalyptic number.

16640336 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

16640336 is a deficient number, since it is larger than the sum of its proper divisors (15600346).

16640336 is a wasteful number, since it uses less digits than its factorization.

16640336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1040029 (or 1040023 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 29.

The square root of 16640336 is about 4079.2567950547. The cubic root of 16640336 is about 255.3018903094.

Adding to 16640336 its reverse (63304661), we get a palindrome (79944997).

The spelling of 16640336 in words is "sixteen million, six hundred forty thousand, three hundred thirty-six".