27775641 has 12 divisors (see below), whose sum is σ = 38067792. Its totient is φ = 18013968.

The previous prime is 27775633. The next prime is 27775687. The reversal of 27775641 is 14657772.

It is not a de Polignac number, because 27775641 - 2³ = 27775633 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 27775641.

It is not an unprimeable number, because it can be changed into a prime (27775691) 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, 726 + ... + 7488.

It is an arithmetic number, because the mean of its divisors is an integer number (3172316).

Almost surely, 2^27775641 is an apocalyptic number.

It is an amenable number.

27775641 is a deficient number, since it is larger than the sum of its proper divisors (10292151).

27775641 is an equidigital number, since it uses as much as digits as its factorization.

27775641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6840 (or 6803 counting only the distinct ones).

The product of its digits is 82320, while the sum is 39.

The square root of 27775641 is about 5270.2600505098. The cubic root of 27775641 is about 302.8456663738.

The spelling of 27775641 in words is "twenty-seven million, seven hundred seventy-five thousand, six hundred forty-one".