27643842 has 20 divisors (see below), whose sum is σ = 61943046. Its totient is φ = 9214560.

The previous prime is 27643831. The next prime is 27643871. The reversal of 27643842 is 24834672.

27643842 is a `hidden beast` number, since 2 + 7 + 643 + 8 + 4 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 27342441 + 301401 = 5229^2 + 549^2 .

It is a junction number, because it is equal to n+sod(n) for n = 27643797 and 27643806.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 85159 + ... + 85482.

Almost surely, 2^27643842 is an apocalyptic number.

27643842 is an abundant number, since it is smaller than the sum of its proper divisors (34299204).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

27643842 is a wasteful number, since it uses less digits than its factorization.

27643842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170655 (or 170646 counting only the distinct ones).

The product of its digits is 64512, while the sum is 36.

The square root of 27643842 is about 5257.7411499616. The cubic root of 27643842 is about 302.3658927897.

The spelling of 27643842 in words is "twenty-seven million, six hundred forty-three thousand, eight hundred forty-two".