26249991 has 8 divisors (see below), whose sum is σ = 35232384. Its totient is φ = 17383800.

The previous prime is 26249987. The next prime is 26250031. The reversal of 26249991 is 19994262.

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

It is not a de Polignac number, because 26249991 - 2² = 26249987 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26249981) 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, 28521 + ... + 29426.

It is an arithmetic number, because the mean of its divisors is an integer number (4404048).

Almost surely, 2^26249991 is an apocalyptic number.

26249991 is a deficient number, since it is larger than the sum of its proper divisors (8982393).

26249991 is a wasteful number, since it uses less digits than its factorization.

26249991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58101.

The product of its digits is 69984, while the sum is 42.

The square root of 26249991 is about 5123.4745046697. The cubic root of 26249991 is about 297.1960636729.

The spelling of 26249991 in words is "twenty-six million, two hundred forty-nine thousand, nine hundred ninety-one".