26640227 has 4 divisors (see below), whose sum is σ = 26766696. Its totient is φ = 26513760.

The previous prime is 26640221. The next prime is 26640247. The reversal of 26640227 is 72204662.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 26640227 - 2⁸ = 26639971 is a prime.

It is a super-2 number, since 2×26640227² = 1419403389223058, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 26640227.

It is not an unprimeable number, because it can be changed into a prime (26640221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62918 + ... + 63339.

It is an arithmetic number, because the mean of its divisors is an integer number (6691674).

Almost surely, 2^26640227 is an apocalyptic number.

26640227 is a deficient number, since it is larger than the sum of its proper divisors (126469).

26640227 is a wasteful number, since it uses less digits than its factorization.

26640227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126468.

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 26640227 is about 5161.4171503571. The cubic root of 26640227 is about 298.6615447466.

Adding to 26640227 its reverse (72204662), we get a palindrome (98844889).

The spelling of 26640227 in words is "twenty-six million, six hundred forty thousand, two hundred twenty-seven".