16777946 has 16 divisors (see below), whose sum is σ = 27369576. Its totient is φ = 7681536.

The previous prime is 16777907. The next prime is 16777949. The reversal of 16777946 is 64977761.

It can be written as a sum of positive squares in 4 ways, for example, as 16491721 + 286225 = 4061^2 + 535^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 16777946.

It is not an unprimeable number, because it can be changed into a prime (16777949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5411 + ... + 7926.

Almost surely, 2^16777946 is an apocalyptic number.

16777946 is a deficient number, since it is larger than the sum of its proper divisors (10591630).

16777946 is a wasteful number, since it uses less digits than its factorization.

16777946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13393.

The product of its digits is 444528, while the sum is 47.

The square root of 16777946 is about 4096.0891103588. The cubic root of 16777946 is about 256.0037129182.

The spelling of 16777946 in words is "sixteen million, seven hundred seventy-seven thousand, nine hundred forty-six".