26780131 has 12 divisors (see below), whose sum is σ = 31048752. Its totient is φ = 22626864.

The previous prime is 26780129. The next prime is 26780153. The reversal of 26780131 is 13108762.

It is not a de Polignac number, because 26780131 - 2¹ = 26780129 is a prime.

It is a super-2 number, since 2×26780131² = 1434350832754322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 26780131.

It is not an unprimeable number, because it can be changed into a prime (26780111) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43381 + ... + 43993.

It is an arithmetic number, because the mean of its divisors is an integer number (2587396).

Almost surely, 2^26780131 is an apocalyptic number.

26780131 is a deficient number, since it is larger than the sum of its proper divisors (4268621).

26780131 is an frugal number, since it uses more digits than its factorization.

26780131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 778 (or 699 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 26780131 is about 5174.9522703113. The cubic root of 26780131 is about 299.1834498731.

Adding to 26780131 its reverse (13108762), we get a palindrome (39888893).

The spelling of 26780131 in words is "twenty-six million, seven hundred eighty thousand, one hundred thirty-one".