27958977488 has 80 divisors (see below), whose sum is σ = 60491128320. Its totient is φ = 12429860352.

The previous prime is 27958977433. The next prime is 27958977493. The reversal of 27958977488 is 88477985972.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2666945 + ... + 2677407.

It is an arithmetic number, because the mean of its divisors is an integer number (756139104).

Almost surely, 2^27958977488 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27958977488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30245564160).

27958977488 is an abundant number, since it is smaller than the sum of its proper divisors (32532150832).

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

27958977488 is a wasteful number, since it uses less digits than its factorization.

27958977488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10956 (or 10950 counting only the distinct ones).

The product of its digits is 568995840, while the sum is 74.

The spelling of 27958977488 in words is "twenty-seven billion, nine hundred fifty-eight million, nine hundred seventy-seven thousand, four hundred eighty-eight".