27909942 has 16 divisors (see below), whose sum is σ = 56056320. Its totient is φ = 9263912.

The previous prime is 27909929. The next prime is 27909953. The reversal of 27909942 is 24990972.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 27909894 and 27909903.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8298 + ... + 11165.

It is an arithmetic number, because the mean of its divisors is an integer number (3503520).

Almost surely, 2^27909942 is an apocalyptic number.

27909942 is an abundant number, since it is smaller than the sum of its proper divisors (28146378).

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

27909942 is a wasteful number, since it uses less digits than its factorization.

27909942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19707.

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 27909942 is about 5282.9860874320. The cubic root of 27909942 is about 303.3329890374.

The spelling of 27909942 in words is "twenty-seven million, nine hundred nine thousand, nine hundred forty-two".