27258978 has 16 divisors (see below), whose sum is σ = 54588960. Its totient is φ = 9074496.

The previous prime is 27258971. The next prime is 27258989. The reversal of 27258978 is 87985272.

It is not an unprimeable number, because it can be changed into a prime (27258971) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2938 + ... + 7946.

It is an arithmetic number, because the mean of its divisors is an integer number (3411810).

Almost surely, 2^27258978 is an apocalyptic number.

27258978 is an abundant number, since it is smaller than the sum of its proper divisors (27329982).

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

27258978 is a wasteful number, since it uses less digits than its factorization.

27258978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5921.

The product of its digits is 564480, while the sum is 48.

The square root of 27258978 is about 5221.0131200755. The cubic root of 27258978 is about 300.9561272759.

The spelling of 27258978 in words is "twenty-seven million, two hundred fifty-eight thousand, nine hundred seventy-eight".