26995991 has 8 divisors (see below), whose sum is σ = 29737344. Its totient is φ = 24302520.

The previous prime is 26995963. The next prime is 26996003. The reversal of 26995991 is 19959962.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 26995991 - 2¹⁴ = 26979607 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 (26995291) 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, 10781 + ... + 13046.

It is an arithmetic number, because the mean of its divisors is an integer number (3717168).

Almost surely, 2^26995991 is an apocalyptic number.

26995991 is a deficient number, since it is larger than the sum of its proper divisors (2741353).

26995991 is a wasteful number, since it uses less digits than its factorization.

26995991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23941.

The product of its digits is 393660, while the sum is 50.

The square root of 26995991 is about 5195.7666421809. The cubic root of 26995991 is about 299.9851511169.

The spelling of 26995991 in words is "twenty-six million, nine hundred ninety-five thousand, nine hundred ninety-one".