16816456 has 8 divisors (see below), whose sum is σ = 31530870. Its totient is φ = 8408224.

The previous prime is 16816453. The next prime is 16816469. The reversal of 16816456 is 65461861.

It can be written as a sum of positive squares in only one way, i.e., 14364100 + 2452356 = 3790^2 + 1566^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (16816453) 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 as a sum of consecutive naturals, namely, 1051021 + ... + 1051036.

Almost surely, 2^16816456 is an apocalyptic number.

It is an amenable number.

16816456 is a deficient number, since it is larger than the sum of its proper divisors (14714414).

16816456 is a wasteful number, since it uses less digits than its factorization.

16816456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2102063 (or 2102059 counting only the distinct ones).

The product of its digits is 34560, while the sum is 37.

The square root of 16816456 is about 4100.7872414940. The cubic root of 16816456 is about 256.1994295606.

The spelling of 16816456 in words is "sixteen million, eight hundred sixteen thousand, four hundred fifty-six".