26640427 has 8 divisors (see below), whose sum is σ = 29413440. Its totient is φ = 23925960.

The previous prime is 26640403. The next prime is 26640437. The reversal of 26640427 is 72404662.

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

It is a cyclic number.

It is not a de Polignac number, because 26640427 - 2²³ = 18251819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26640437) 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, 13677 + ... + 15502.

It is an arithmetic number, because the mean of its divisors is an integer number (3676680).

Almost surely, 2^26640427 is an apocalyptic number.

26640427 is a deficient number, since it is larger than the sum of its proper divisors (2773013).

26640427 is a wasteful number, since it uses less digits than its factorization.

26640427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29273.

The product of its (nonzero) digits is 16128, while the sum is 31.

The square root of 26640427 is about 5161.4365248446. The cubic root of 26640427 is about 298.6622921396.

The spelling of 26640427 in words is "twenty-six million, six hundred forty thousand, four hundred twenty-seven".