26728669 has 8 divisors (see below), whose sum is σ = 29196000. Its totient is φ = 24267600.

The previous prime is 26728643. The next prime is 26728699. The reversal of 26728669 is 96682762.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 26728669 - 2⁹ = 26728157 is a prime.

It is a super-2 number, since 2×26728669² = 1428843493023122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26728609) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15679 + ... + 17299.

It is an arithmetic number, because the mean of its divisors is an integer number (3649500).

Almost surely, 2^26728669 is an apocalyptic number.

It is an amenable number.

26728669 is a deficient number, since it is larger than the sum of its proper divisors (2467331).

26728669 is a wasteful number, since it uses less digits than its factorization.

26728669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3131.

The product of its digits is 435456, while the sum is 46.

The square root of 26728669 is about 5169.9776595262. The cubic root of 26728669 is about 298.9916851713.

The spelling of 26728669 in words is "twenty-six million, seven hundred twenty-eight thousand, six hundred sixty-nine".