16897856 has 14 divisors (see below), whose sum is σ = 33531810. Its totient is φ = 8448896.

The previous prime is 16897843. The next prime is 16897861. The reversal of 16897856 is 65879861.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 10137856 + 6760000 = 3184^2 + 2600^2 .

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, 131951 + ... + 132078.

Almost surely, 2^16897856 is an apocalyptic number.

16897856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

16897856 is a deficient number, since it is larger than the sum of its proper divisors (16633954).

16897856 is an equidigital number, since it uses as much as digits as its factorization.

16897856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264041 (or 264031 counting only the distinct ones).

The product of its digits is 725760, while the sum is 50.

The square root of 16897856 is about 4110.7001836670. The cubic root of 16897856 is about 256.6121418633.

The spelling of 16897856 in words is "sixteen million, eight hundred ninety-seven thousand, eight hundred fifty-six".