26856253 has 4 divisors (see below), whose sum is σ = 28269760. Its totient is φ = 25442748.

The previous prime is 26856239. The next prime is 26856257. The reversal of 26856253 is 35265862.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-26856253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26856257) 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, 706725 + ... + 706762.

It is an arithmetic number, because the mean of its divisors is an integer number (7067440).

Almost surely, 2^26856253 is an apocalyptic number.

It is an amenable number.

26856253 is a deficient number, since it is larger than the sum of its proper divisors (1413507).

26856253 is a wasteful number, since it uses less digits than its factorization.

26856253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1413506.

The product of its digits is 86400, while the sum is 37.

The square root of 26856253 is about 5182.3019016649. The cubic root of 26856253 is about 299.4666560798.

The spelling of 26856253 in words is "twenty-six million, eight hundred fifty-six thousand, two hundred fifty-three".