26620257 has 8 divisors (see below), whose sum is σ = 36163584. Its totient is φ = 17411888.

The previous prime is 26620241. The next prime is 26620261. The reversal of 26620257 is 75202662.

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 26620257 - 2⁴ = 26620241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (26620207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83553 + ... + 83870.

It is an arithmetic number, because the mean of its divisors is an integer number (4520448).

Almost surely, 2^26620257 is an apocalyptic number.

It is an amenable number.

26620257 is a deficient number, since it is larger than the sum of its proper divisors (9543327).

26620257 is a wasteful number, since it uses less digits than its factorization.

26620257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167479.

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 26620257 is about 5159.4822414657. The cubic root of 26620257 is about 298.5868987112.

The spelling of 26620257 in words is "twenty-six million, six hundred twenty thousand, two hundred fifty-seven".