27798631 has 6 divisors (see below), whose sum is σ = 32337240. Its totient is φ = 23827356.

The previous prime is 27798629. The next prime is 27798637. The reversal of 27798631 is 13689772.

It is a happy number.

It is not a de Polignac number, because 27798631 - 2¹ = 27798629 is a prime.

It is a super-2 number, since 2×27798631² = 1545527770948322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27798637) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 283611 + ... + 283708.

It is an arithmetic number, because the mean of its divisors is an integer number (5389540).

Almost surely, 2^27798631 is an apocalyptic number.

27798631 is a deficient number, since it is larger than the sum of its proper divisors (4538609).

27798631 is an equidigital number, since it uses as much as digits as its factorization.

27798631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 567333 (or 567326 counting only the distinct ones).

The product of its digits is 127008, while the sum is 43.

The square root of 27798631 is about 5272.4407061626. The cubic root of 27798631 is about 302.9291988212.

The spelling of 27798631 in words is "twenty-seven million, seven hundred ninety-eight thousand, six hundred thirty-one".