26991492 has 24 divisors (see below), whose sum is σ = 68705952. Its totient is φ = 8179200.

The previous prime is 26991491. The next prime is 26991493. The reversal of 26991492 is 29419962.

It is an interprime number because it is at equal distance from previous prime (26991491) and next prime (26991493).

It is not an unprimeable number, because it can be changed into a prime (26991491) 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, 102109 + ... + 102372.

It is an arithmetic number, because the mean of its divisors is an integer number (2862748).

Almost surely, 2^26991492 is an apocalyptic number.

26991492 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

26991492 is an abundant number, since it is smaller than the sum of its proper divisors (41714460).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

26991492 is a wasteful number, since it uses less digits than its factorization.

26991492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204499 (or 204497 counting only the distinct ones).

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

The square root of 26991492 is about 5195.3336755208. Note that the first 3 decimals coincide. The cubic root of 26991492 is about 299.9684855785.

The spelling of 26991492 in words is "twenty-six million, nine hundred ninety-one thousand, four hundred ninety-two".