26921668 has 12 divisors (see below), whose sum is σ = 48002220. Its totient is φ = 13206752.

The previous prime is 26921627. The next prime is 26921669. The reversal of 26921668 is 86612962.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 21455424 + 5466244 = 4632^2 + 2338^2 .

It is a super-3 number, since 3×26921668³ (a number of 23 digits) contains 333 as substring.

It is a plaindrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 26921668.

It is not an unprimeable number, because it can be changed into a prime (26921669) 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, 63283 + ... + 63706.

It is an arithmetic number, because the mean of its divisors is an integer number (4000185).

Almost surely, 2^26921668 is an apocalyptic number.

It is an amenable number.

26921668 is a deficient number, since it is larger than the sum of its proper divisors (21080552).

26921668 is a wasteful number, since it uses less digits than its factorization.

26921668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127046 (or 127044 counting only the distinct ones).

The product of its digits is 62208, while the sum is 40.

The square root of 26921668 is about 5188.6094476266. The cubic root of 26921668 is about 299.7096004659.

The spelling of 26921668 in words is "twenty-six million, nine hundred twenty-one thousand, six hundred sixty-eight".