26690128 has 10 divisors (see below), whose sum is σ = 51712154. Its totient is φ = 13345056.

The previous prime is 26690099. The next prime is 26690129. The reversal of 26690128 is 82109662.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 21270544 + 5419584 = 4612^2 + 2328^2 .

It is a junction number, because it is equal to n+sod(n) for n = 26690093 and 26690102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26690129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 834051 + ... + 834082.

Almost surely, 2^26690128 is an apocalyptic number.

It is an amenable number.

26690128 is a deficient number, since it is larger than the sum of its proper divisors (25022026).

26690128 is a wasteful number, since it uses less digits than its factorization.

26690128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1668141 (or 1668135 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 26690128 is about 5166.2489293490. The cubic root of 26690128 is about 298.8479071968.

The spelling of 26690128 in words is "twenty-six million, six hundred ninety thousand, one hundred twenty-eight".