26189919 has 16 divisors (see below), whose sum is σ = 44343040. Its totient is φ = 14965560.

The previous prime is 26189909. The next prime is 26189921. The reversal of 26189919 is 91998162.

It is not a de Polignac number, because 26189919 - 2¹² = 26185823 is a prime.

It is a super-2 number, since 2×26189919² = 1371823714453122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26189909) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69097 + ... + 69474.

It is an arithmetic number, because the mean of its divisors is an integer number (2771440).

Almost surely, 2^26189919 is an apocalyptic number.

26189919 is a deficient number, since it is larger than the sum of its proper divisors (18153121).

26189919 is a wasteful number, since it uses less digits than its factorization.

26189919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138587 (or 138581 counting only the distinct ones).

The product of its digits is 69984, while the sum is 45.

The square root of 26189919 is about 5117.6087189233. The cubic root of 26189919 is about 296.9691836203.

It can be divided in two parts, 2 and 6189919, that added together give a triangular number (6189921 = T₃₅₁₈).

The spelling of 26189919 in words is "twenty-six million, one hundred eighty-nine thousand, nine hundred nineteen".