26891401 has 4 divisors (see below), whose sum is σ = 27129492. Its totient is φ = 26653312.

The previous prime is 26891377. The next prime is 26891411. The reversal of 26891401 is 10419862.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11868025 + 15023376 = 3445^2 + 3876^2 .

It is a cyclic number.

It is not a de Polignac number, because 26891401 - 2⁵ = 26891369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (26891411) 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 3 ways as a sum of consecutive naturals, for example, 118876 + ... + 119101.

It is an arithmetic number, because the mean of its divisors is an integer number (6782373).

Almost surely, 2^26891401 is an apocalyptic number.

It is an amenable number.

26891401 is a deficient number, since it is larger than the sum of its proper divisors (238091).

26891401 is a wasteful number, since it uses less digits than its factorization.

26891401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238090.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 26891401 is about 5185.6919499716. The cubic root of 26891401 is about 299.5972410074.

The spelling of 26891401 in words is "twenty-six million, eight hundred ninety-one thousand, four hundred one".