27771142 has 24 divisors (see below), whose sum is σ = 48693960. Its totient is φ = 11844000.

The previous prime is 27771131. The next prime is 27771157. The reversal of 27771142 is 24117772.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24034 + ... + 25162.

It is an arithmetic number, because the mean of its divisors is an integer number (2028915).

Almost surely, 2^27771142 is an apocalyptic number.

27771142 is a deficient number, since it is larger than the sum of its proper divisors (20922818).

27771142 is a wasteful number, since it uses less digits than its factorization.

27771142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1396 (or 1389 counting only the distinct ones).

The product of its digits is 5488, while the sum is 31.

The square root of 27771142 is about 5269.8332041916. The cubic root of 27771142 is about 302.8293142012.

The spelling of 27771142 in words is "twenty-seven million, seven hundred seventy-one thousand, one hundred forty-two".