27798018 has 8 divisors (see below), whose sum is σ = 55596048. Its totient is φ = 9266004.

The previous prime is 27798013. The next prime is 27798019. The reversal of 27798018 is 81089772.

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

27798018 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (27798011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2316496 + ... + 2316507.

It is an arithmetic number, because the mean of its divisors is an integer number (6949506).

Almost surely, 2^27798018 is an apocalyptic number.

27798018 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

27798018 is a wasteful number, since it uses less digits than its factorization.

27798018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4633008.

The product of its (nonzero) digits is 56448, while the sum is 42.

The square root of 27798018 is about 5272.3825733723. The cubic root of 27798018 is about 302.9269721292.

The spelling of 27798018 in words is "twenty-seven million, seven hundred ninety-eight thousand, eighteen".