27890636394 has 16 divisors (see below), whose sum is σ = 55844887968. Its totient is φ = 9286276272.

The previous prime is 27890636387. The next prime is 27890636399. The reversal of 27890636394 is 49363609872.

It is not an unprimeable number, because it can be changed into a prime (27890636399) 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, 2644932 + ... + 2655455.

It is an arithmetic number, because the mean of its divisors is an integer number (3490305498).

Almost surely, 2^27890636394 is an apocalyptic number.

27890636394 is an abundant number, since it is smaller than the sum of its proper divisors (27954251574).

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

27890636394 is a wasteful number, since it uses less digits than its factorization.

27890636394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5301269.

The product of its (nonzero) digits is 11757312, while the sum is 57.

The spelling of 27890636394 in words is "twenty-seven billion, eight hundred ninety million, six hundred thirty-six thousand, three hundred ninety-four".