26989128 has 24 divisors (see below), whose sum is σ = 73095750. Its totient is φ = 8996352.

The previous prime is 26989099. The next prime is 26989129. The reversal of 26989128 is 82198962.

It can be written as a sum of positive squares in only one way, i.e., 16990884 + 9998244 = 4122^2 + 3162^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (26989129) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 187353 + ... + 187496.

Almost surely, 2^26989128 is an apocalyptic number.

It is an amenable number.

26989128 is an abundant number, since it is smaller than the sum of its proper divisors (46106622).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

26989128 is a wasteful number, since it uses less digits than its factorization.

26989128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374861 (or 374854 counting only the distinct ones).

The product of its digits is 124416, while the sum is 45.

The square root of 26989128 is about 5195.1061586843. The cubic root of 26989128 is about 299.9597279274.

The spelling of 26989128 in words is "twenty-six million, nine hundred eighty-nine thousand, one hundred twenty-eight".