27791442 has 48 divisors (see below), whose sum is σ = 69119232. Its totient is φ = 7905600.

The previous prime is 27791441. The next prime is 27791453. The reversal of 27791442 is 24419772.

It is a junction number, because it is equal to n+sod(n) for n = 27791397 and 27791406.

It is not an unprimeable number, because it can be changed into a prime (27791441) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45942 + ... + 46542.

It is an arithmetic number, because the mean of its divisors is an integer number (1439984).

Almost surely, 2^27791442 is an apocalyptic number.

27791442 is an abundant number, since it is smaller than the sum of its proper divisors (41327790).

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

27791442 is a wasteful number, since it uses less digits than its factorization.

27791442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 983 (or 980 counting only the distinct ones).

The product of its digits is 28224, while the sum is 36.

The square root of 27791442 is about 5271.7589095102. The cubic root of 27791442 is about 302.9030830775.

It can be divided in two parts, 277 and 91442, that added together give a palindrome (91719).

The spelling of 27791442 in words is "twenty-seven million, seven hundred ninety-one thousand, four hundred forty-two".