27891004036 has 81 divisors (see below), whose sum is σ = 57889279287. Its totient is φ = 11723821200.

The previous prime is 27891004013. The next prime is 27891004051. The reversal of 27891004036 is 63040019872.

The square root of 27891004036 is 167006.

It is a perfect power (a square), and thus also a powerful number.

It is a super-2 number, since 2×27891004036² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 27891004036.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 184708561 + ... + 184708711.

Almost surely, 2^27891004036 is an apocalyptic number.

27891004036 is the 167006-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27891004036

27891004036 is an abundant number, since it is smaller than the sum of its proper divisors (29998275251).

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

27891004036 is an equidigital number, since it uses as much as digits as its factorization.

27891004036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478 (or 239 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 40.

The spelling of 27891004036 in words is "twenty-seven billion, eight hundred ninety-one million, four thousand, thirty-six".