26840645 has 16 divisors (see below), whose sum is σ = 35132160. Its totient is φ = 19566144.

The previous prime is 26840641. The next prime is 26840647. The reversal of 26840645 is 54604862.

It is not a de Polignac number, because 26840645 - 2² = 26840641 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26840641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2522 + ... + 7748.

It is an arithmetic number, because the mean of its divisors is an integer number (2195760).

Almost surely, 2^26840645 is an apocalyptic number.

It is an amenable number.

26840645 is a deficient number, since it is larger than the sum of its proper divisors (8291515).

26840645 is a wasteful number, since it uses less digits than its factorization.

26840645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5324.

The product of its (nonzero) digits is 46080, while the sum is 35.

The square root of 26840645 is about 5180.7957882935. The cubic root of 26840645 is about 299.4086313393.

The spelling of 26840645 in words is "twenty-six million, eight hundred forty thousand, six hundred forty-five".