26978928 has 40 divisors (see below), whose sum is σ = 71947776. Its totient is φ = 8702400.

The previous prime is 26978923. The next prime is 26978947. The reversal of 26978928 is 82987962.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26978923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7578 + ... + 10553.

Almost surely, 2^26978928 is an apocalyptic number.

It is an amenable number.

26978928 is an abundant number, since it is smaller than the sum of its proper divisors (44968848).

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

26978928 is a wasteful number, since it uses less digits than its factorization.

26978928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18173 (or 18167 counting only the distinct ones).

The product of its digits is 870912, while the sum is 51.

The square root of 26978928 is about 5194.1243727889. The cubic root of 26978928 is about 299.9219352436.

It can be divided in two parts, 269 and 78928, that added together give a palindrome (79197).

The spelling of 26978928 in words is "twenty-six million, nine hundred seventy-eight thousand, nine hundred twenty-eight".