26429881 has 9 divisors (see below), whose sum is σ = 27218541. Its totient is φ = 25663872.

The previous prime is 26429873. The next prime is 26429891. The reversal of 26429881 is 18892462.

The square root of 26429881 is 5141.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 826281 + 25603600 = 909^2 + 5060^2 .

It is not a de Polignac number, because 26429881 - 2³ = 26429873 is a prime.

It is a super-2 number, since 2×26429881² = 1397077219348322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26429831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 272425 + ... + 272521.

Almost surely, 2^26429881 is an apocalyptic number.

26429881 is the 5141-st square number.

26429881 is the 2571-st centered octagonal number.

It is an amenable number.

26429881 is a deficient number, since it is larger than the sum of its proper divisors (788660).

26429881 is an frugal number, since it uses more digits than its factorization.

26429881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300 (or 150 counting only the distinct ones).

The product of its digits is 55296, while the sum is 40.

The cubic root of 26429881 is about 297.8734091387.

The spelling of 26429881 in words is "twenty-six million, four hundred twenty-nine thousand, eight hundred eighty-one".