26720645 has 8 divisors (see below), whose sum is σ = 36645504. Its totient is φ = 18322704.

The previous prime is 26720627. The next prime is 26720647. The reversal of 26720645 is 54602762.

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 26720645 - 2⁸ = 26720389 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26720647) 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, 381689 + ... + 381758.

It is an arithmetic number, because the mean of its divisors is an integer number (4580688).

Almost surely, 2^26720645 is an apocalyptic number.

It is an amenable number.

26720645 is a deficient number, since it is larger than the sum of its proper divisors (9924859).

26720645 is an equidigital number, since it uses as much as digits as its factorization.

26720645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 763459.

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 26720645 is about 5169.2015824497. The cubic root of 26720645 is about 298.9617628758.

The spelling of 26720645 in words is "twenty-six million, seven hundred twenty thousand, six hundred forty-five".