16689268 has 12 divisors (see below), whose sum is σ = 30213540. Its totient is φ = 8056832.

The previous prime is 16689263. The next prime is 16689293. The reversal of 16689268 is 86298661.

It can be written as a sum of positive squares in 2 ways, for example, as 3526884 + 13162384 = 1878^2 + 3628^2 .

It is a nialpdrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16689263) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71821 + ... + 72052.

It is an arithmetic number, because the mean of its divisors is an integer number (2517795).

Almost surely, 2^16689268 is an apocalyptic number.

It is an amenable number.

16689268 is a deficient number, since it is larger than the sum of its proper divisors (13524272).

16689268 is a wasteful number, since it uses less digits than its factorization.

16689268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143906 (or 143904 counting only the distinct ones).

The product of its digits is 248832, while the sum is 46.

The square root of 16689268 is about 4085.2500535463. The cubic root of 16689268 is about 255.5518894104.

The spelling of 16689268 in words is "sixteen million, six hundred eighty-nine thousand, two hundred sixty-eight".