27768401 has 2 divisors, whose sum is σ = 27768402. Its totient is φ = 27768400.

The previous prime is 27768379. The next prime is 27768407. The reversal of 27768401 is 10486772.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22316176 + 5452225 = 4724^2 + 2335^2 .

It is a cyclic number.

It is not a de Polignac number, because 27768401 - 2¹⁸ = 27506257 is a prime.

It is not a weakly prime, because it can be changed into another prime (27768407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13884200 + 13884201.

It is an arithmetic number, because the mean of its divisors is an integer number (13884201).

Almost surely, 2^27768401 is an apocalyptic number.

It is an amenable number.

27768401 is a deficient number, since it is larger than the sum of its proper divisors (1).

27768401 is an equidigital number, since it uses as much as digits as its factorization.

27768401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18816, while the sum is 35.

The square root of 27768401 is about 5269.5731326171. The cubic root of 27768401 is about 302.8193508315.

The spelling of 27768401 in words is "twenty-seven million, seven hundred sixty-eight thousand, four hundred one".