27587899380 has 24 divisors (see below), whose sum is σ = 77246118432. Its totient is φ = 7356773152.

The previous prime is 27587899379. The next prime is 27587899393. The reversal of 27587899380 is 8399878572.

It is a happy number.

It is a super-2 number, since 2×27587899380² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 229899102 + ... + 229899221.

It is an arithmetic number, because the mean of its divisors is an integer number (3218588268).

Almost surely, 2^27587899380 is an apocalyptic number.

27587899380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27587899380 is an abundant number, since it is smaller than the sum of its proper divisors (49658219052).

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

27587899380 is a wasteful number, since it uses less digits than its factorization.

27587899380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 459798335 (or 459798333 counting only the distinct ones).

The product of its (nonzero) digits is 60963840, while the sum is 66.

The spelling of 27587899380 in words is "twenty-seven billion, five hundred eighty-seven million, eight hundred ninety-nine thousand, three hundred eighty".