27778942 has 8 divisors (see below), whose sum is σ = 41972976. Its totient is φ = 13787952.

The previous prime is 27778889. The next prime is 27778979. The reversal of 27778942 is 24987772.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 27778892 and 27778901.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50418 + ... + 50965.

It is an arithmetic number, because the mean of its divisors is an integer number (5246622).

Almost surely, 2^27778942 is an apocalyptic number.

27778942 is a deficient number, since it is larger than the sum of its proper divisors (14194034).

27778942 is a wasteful number, since it uses less digits than its factorization.

27778942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101522.

The product of its digits is 395136, while the sum is 46.

The square root of 27778942 is about 5270.5732136078. The cubic root of 27778942 is about 302.8576631439.

The spelling of 27778942 in words is "twenty-seven million, seven hundred seventy-eight thousand, nine hundred forty-two".