27828131 has 2 divisors, whose sum is σ = 27828132. Its totient is φ = 27828130.

The previous prime is 27828121. The next prime is 27828149. The reversal of 27828131 is 13182872.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27828131 - 2⁶ = 27828067 is a prime.

It is a super-2 number, since 2×27828131² = 1548809749906322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (27828121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13914065 + 13914066.

It is an arithmetic number, because the mean of its divisors is an integer number (13914066).

Almost surely, 2^27828131 is an apocalyptic number.

27828131 is a deficient number, since it is larger than the sum of its proper divisors (1).

27828131 is an equidigital number, since it uses as much as digits as its factorization.

27828131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5376, while the sum is 32.

The square root of 27828131 is about 5275.2375301971. The cubic root of 27828131 is about 303.0363174308.

The spelling of 27828131 in words is "twenty-seven million, eight hundred twenty-eight thousand, one hundred thirty-one".