26728631 has 2 divisors, whose sum is σ = 26728632. Its totient is φ = 26728630.

The previous prime is 26728621. The next prime is 26728643. The reversal of 26728631 is 13682762.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26728631 - 2¹⁴ = 26712247 is a prime.

It is a super-2 number, since 2×26728631² = 1428839430268322, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 26728591 and 26728600.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26728601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13364315 + 13364316.

It is an arithmetic number, because the mean of its divisors is an integer number (13364316).

Almost surely, 2^26728631 is an apocalyptic number.

26728631 is a deficient number, since it is larger than the sum of its proper divisors (1).

26728631 is an equidigital number, since it uses as much as digits as its factorization.

26728631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192, while the sum is 35.

The square root of 26728631 is about 5169.9739844607. The cubic root of 26728631 is about 298.9915434796.

The spelling of 26728631 in words is "twenty-six million, seven hundred twenty-eight thousand, six hundred thirty-one".