27858872208 has 160 divisors (see below), whose sum is σ = 78594969600. Its totient is φ = 8473420800.

The previous prime is 27858872191. The next prime is 27858872263. The reversal of 27858872208 is 80227885872.

It is a happy number.

It is a super-2 number, since 2×27858872208² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2949253 + ... + 2958683.

It is an arithmetic number, because the mean of its divisors is an integer number (491218560).

Almost surely, 2^27858872208 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 27858872208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39297484800).

27858872208 is an abundant number, since it is smaller than the sum of its proper divisors (50736097392).

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

27858872208 is a wasteful number, since it uses less digits than its factorization.

27858872208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9581 (or 9575 counting only the distinct ones).

The product of its (nonzero) digits is 8028160, while the sum is 57.

The spelling of 27858872208 in words is "twenty-seven billion, eight hundred fifty-eight million, eight hundred seventy-two thousand, two hundred eight".