26220978 has 96 divisors (see below), whose sum is σ = 68889600. Its totient is φ = 7197120.

The previous prime is 26220977. The next prime is 26220979. The reversal of 26220978 is 87902262.

It is an interprime number because it is at equal distance from previous prime (26220977) and next prime (26220979).

It is not an unprimeable number, because it can be changed into a prime (26220973) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 191326 + ... + 191462.

It is an arithmetic number, because the mean of its divisors is an integer number (717600).

Almost surely, 2^26220978 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26220978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34444800).

26220978 is an abundant number, since it is smaller than the sum of its proper divisors (42668622).

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

26220978 is a wasteful number, since it uses less digits than its factorization.

26220978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197 (or 180 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 26220978 is about 5120.6423425191. The cubic root of 26220978 is about 297.0865305806.

The spelling of 26220978 in words is "twenty-six million, two hundred twenty thousand, nine hundred seventy-eight".