26220381 has 8 divisors (see below), whose sum is σ = 38138784. Its totient is φ = 15891120.

The previous prime is 26220377. The next prime is 26220419. The reversal of 26220381 is 18302262.

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

It is not a de Polignac number, because 26220381 - 2² = 26220377 is a prime.

It is a super-2 number, since 2×26220381² = 1375016759570322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26220881) 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, 397246 + ... + 397311.

It is an arithmetic number, because the mean of its divisors is an integer number (4767348).

Almost surely, 2^26220381 is an apocalyptic number.

It is an amenable number.

26220381 is a deficient number, since it is larger than the sum of its proper divisors (11918403).

26220381 is a wasteful number, since it uses less digits than its factorization.

26220381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 794571.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 26220381 is about 5120.5840487194. The cubic root of 26220381 is about 297.0842758719.

The spelling of 26220381 in words is "twenty-six million, two hundred twenty thousand, three hundred eighty-one".