26690481 has 6 divisors (see below), whose sum is σ = 38552930. Its totient is φ = 17793648.

The previous prime is 26690437. The next prime is 26690483. The reversal of 26690481 is 18409662.

It can be written as a sum of positive squares in only one way, i.e., 19847025 + 6843456 = 4455^2 + 2616^2 .

It is not a de Polignac number, because 26690481 - 2⁹ = 26689969 is a prime.

It is a super-2 number, since 2×26690481² = 1424763552022722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (26690483) 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 5 ways as a sum of consecutive naturals, for example, 1482796 + ... + 1482813.

Almost surely, 2^26690481 is an apocalyptic number.

It is an amenable number.

26690481 is a deficient number, since it is larger than the sum of its proper divisors (11862449).

26690481 is a wasteful number, since it uses less digits than its factorization.

26690481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2965615 (or 2965612 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 26690481 is about 5166.2830932886. The cubic root of 26690481 is about 298.8492246983.

The spelling of 26690481 in words is "twenty-six million, six hundred ninety thousand, four hundred eighty-one".