16689056 has 12 divisors (see below), whose sum is σ = 32856642. Its totient is φ = 8344512.

The previous prime is 16688999. The next prime is 16689061. The reversal of 16689056 is 65098661.

It can be written as a sum of positive squares in only one way, i.e., 16679056 + 10000 = 4084^2 + 100^2 .

It is a super-2 number, since 2×16689056² = 557049180342272, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260735 + ... + 260798.

Almost surely, 2^16689056 is an apocalyptic number.

16689056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

16689056 is a deficient number, since it is larger than the sum of its proper divisors (16167586).

16689056 is an equidigital number, since it uses as much as digits as its factorization.

16689056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521543 (or 521535 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 16689056 is about 4085.2241064598. The cubic root of 16689056 is about 255.5508073332.

The spelling of 16689056 in words is "sixteen million, six hundred eighty-nine thousand, fifty-six".