26487981 has 48 divisors (see below), whose sum is σ = 43563520. Its totient is φ = 15396480.

The previous prime is 26487971. The next prime is 26487997. The reversal of 26487981 is 18978462.

It is not a de Polignac number, because 26487981 - 2⁶ = 26487917 is a prime.

It is a super-2 number, since 2×26487981² = 1403226274912722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26487961) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 242955 + ... + 243063.

Almost surely, 2^26487981 is an apocalyptic number.

It is an amenable number.

26487981 is a deficient number, since it is larger than the sum of its proper divisors (17075539).

26487981 is a wasteful number, since it uses less digits than its factorization.

26487981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226 (or 223 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 26487981 is about 5146.6475496191. The cubic root of 26487981 is about 298.0915180678.

The spelling of 26487981 in words is "twenty-six million, four hundred eighty-seven thousand, nine hundred eighty-one".