27030978 has 48 divisors (see below), whose sum is σ = 63999936. Its totient is φ = 8195040.

The previous prime is 27030973. The next prime is 27030989. The reversal of 27030978 is 87903072.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (27030973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15801 + ... + 17427.

It is an arithmetic number, because the mean of its divisors is an integer number (1333332).

Almost surely, 2^27030978 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27030978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31999968).

27030978 is an abundant number, since it is smaller than the sum of its proper divisors (36968958).

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

27030978 is a wasteful number, since it uses less digits than its factorization.

27030978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1719 (or 1716 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 27030978 is about 5199.1324276267. The cubic root of 27030978 is about 300.1146894822.

The spelling of 27030978 in words is "twenty-seven million, thirty thousand, nine hundred seventy-eight".