26956991 has 8 divisors (see below), whose sum is σ = 28980480. Its totient is φ = 24994008.

The previous prime is 26956961. The next prime is 26956997. The reversal of 26956991 is 19965962.

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 26956991 - 2⁶ = 26956927 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26956997) 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, 14201 + ... + 15986.

It is an arithmetic number, because the mean of its divisors is an integer number (3622560).

Almost surely, 2^26956991 is an apocalyptic number.

26956991 is a deficient number, since it is larger than the sum of its proper divisors (2023489).

26956991 is a wasteful number, since it uses less digits than its factorization.

26956991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30253.

The product of its digits is 262440, while the sum is 47.

The square root of 26956991 is about 5192.0122303400. The cubic root of 26956991 is about 299.8406227520.

The spelling of 26956991 in words is "twenty-six million, nine hundred fifty-six thousand, nine hundred ninety-one".