16639802 has 16 divisors (see below), whose sum is σ = 25340040. Its totient is φ = 8194368.

The previous prime is 16639793. The next prime is 16639807. The reversal of 16639802 is 20893661.

It can be written as a sum of positive squares in 4 ways, for example, as 13608721 + 3031081 = 3689^2 + 1741^2 .

It is not an unprimeable number, because it can be changed into a prime (16639807) by changing a digit.

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, 61724 + ... + 61992.

Almost surely, 2^16639802 is an apocalyptic number.

16639802 is a deficient number, since it is larger than the sum of its proper divisors (8700238).

16639802 is a wasteful number, since it uses less digits than its factorization.

16639802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 625.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 16639802 is about 4079.1913414303. The cubic root of 16639802 is about 255.2991593415.

The spelling of 16639802 in words is "sixteen million, six hundred thirty-nine thousand, eight hundred two".