26980191 has 24 divisors (see below), whose sum is σ = 44748704. Its totient is φ = 15344640.

The previous prime is 26980189. The next prime is 26980193. The reversal of 26980191 is 19108962.

It is an interprime number because it is at equal distance from previous prime (26980189) and next prime (26980193).

It is not a de Polignac number, because 26980191 - 2¹ = 26980189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26980193) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14295 + ... + 16071.

Almost surely, 2^26980191 is an apocalyptic number.

26980191 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

26980191 is a deficient number, since it is larger than the sum of its proper divisors (17768513).

26980191 is a wasteful number, since it uses less digits than its factorization.

26980191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2031 (or 2028 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 36.

The square root of 26980191 is about 5194.2459510501. The cubic root of 26980191 is about 299.9266153838.

The spelling of 26980191 in words is "twenty-six million, nine hundred eighty thousand, one hundred ninety-one".