16640726 has 16 divisors (see below), whose sum is σ = 25643520. Its totient is φ = 8095080.

The previous prime is 16640681. The next prime is 16640731. The reversal of 16640726 is 62704661.

It is a junction number, because it is equal to n+sod(n) for n = 16640692 and 16640701.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19415 + ... + 20253.

It is an arithmetic number, because the mean of its divisors is an integer number (1602720).

Almost surely, 2^16640726 is an apocalyptic number.

16640726 is a deficient number, since it is larger than the sum of its proper divisors (9002794).

16640726 is a wasteful number, since it uses less digits than its factorization.

16640726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1099.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 16640726 is about 4079.3045975999. The cubic root of 16640726 is about 255.3038847995.

The spelling of 16640726 in words is "sixteen million, six hundred forty thousand, seven hundred twenty-six".