26128869 has 8 divisors (see below), whose sum is σ = 37518432. Its totient is φ = 16079280.

The previous prime is 26128859. The next prime is 26128871. The reversal of 26128869 is 96882162.

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

It is not a de Polignac number, because 26128869 - 2¹⁹ = 25604581 is a prime.

It is a super-2 number, since 2×26128869² = 1365435590438322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 26128869.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26128829) 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, 334947 + ... + 335024.

It is an arithmetic number, because the mean of its divisors is an integer number (4689804).

Almost surely, 2^26128869 is an apocalyptic number.

It is an amenable number.

26128869 is a deficient number, since it is larger than the sum of its proper divisors (11389563).

26128869 is a wasteful number, since it uses less digits than its factorization.

26128869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 669987.

The product of its digits is 82944, while the sum is 42.

The square root of 26128869 is about 5111.6405390051. The cubic root of 26128869 is about 296.7382541264.

The spelling of 26128869 in words is "twenty-six million, one hundred twenty-eight thousand, eight hundred sixty-nine".