27780442 has 16 divisors (see below), whose sum is σ = 42517440. Its totient is φ = 13610592.

The previous prime is 27780419. The next prime is 27780457. The reversal of 27780442 is 24408772.

It is a junction number, because it is equal to n+sod(n) for n = 27780398 and 27780407.

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, 25603 + ... + 26665.

It is an arithmetic number, because the mean of its divisors is an integer number (2657340).

Almost surely, 2^27780442 is an apocalyptic number.

27780442 is a deficient number, since it is larger than the sum of its proper divisors (14736998).

27780442 is a wasteful number, since it uses less digits than its factorization.

27780442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1317.

The product of its (nonzero) digits is 25088, while the sum is 34.

The square root of 27780442 is about 5270.7155111996. The cubic root of 27780442 is about 302.8631142553.

The spelling of 27780442 in words is "twenty-seven million, seven hundred eighty thousand, four hundred forty-two".