27868128408 has 48 divisors (see below), whose sum is σ = 78271600680. Its totient is φ = 9289375488.

The previous prime is 27868128403. The next prime is 27868128451. The reversal of 27868128408 is 80482186872.

It is a super-2 number, since 2×27868128408² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27868128403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7165785 + ... + 7169672.

Almost surely, 2^27868128408 is an apocalyptic number.

It is an amenable number.

27868128408 is an abundant number, since it is smaller than the sum of its proper divisors (50403472272).

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

27868128408 is a wasteful number, since it uses less digits than its factorization.

27868128408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14335478 (or 14335462 counting only the distinct ones).

The product of its (nonzero) digits is 2752512, while the sum is 54.

The spelling of 27868128408 in words is "twenty-seven billion, eight hundred sixty-eight million, one hundred twenty-eight thousand, four hundred eight".