27998539828490 has 96 divisors (see below), whose sum is σ = 66735763277184. Its totient is φ = 8347390719360.

The previous prime is 27998539828481. The next prime is 27998539828499. The reversal of 27998539828490 is 9482893589972.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (27998539828481) and next prime (27998539828499).

It is a junction number, because it is equal to n+sod(n) for n = 27998539828399 and 27998539828408.

It is not an unprimeable number, because it can be changed into a prime (27998539828499) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 112800689 + ... + 113048628.

It is an arithmetic number, because the mean of its divisors is an integer number (695164200804).

Almost surely, 2^{27998539828490} is an apocalyptic number.

27998539828490 is an abundant number, since it is smaller than the sum of its proper divisors (38737223448694).

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

27998539828490 is a wasteful number, since it uses less digits than its factorization.

27998539828490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225849372 (or 225849365 counting only the distinct ones).

The product of its (nonzero) digits is 5643509760, while the sum is 83.

The spelling of 27998539828490 in words is "twenty-seven trillion, nine hundred ninety-eight billion, five hundred thirty-nine million, eight hundred twenty-eight thousand, four hundred ninety".