27771087940 has 24 divisors (see below), whose sum is σ = 58351995072. Its totient is φ = 11102204640.

The previous prime is 27771087931. The next prime is 27771087947. The reversal of 27771087940 is 4978017772.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (27771087947) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 352776 + ... + 424255.

It is an arithmetic number, because the mean of its divisors is an integer number (2431333128).

Almost surely, 2^27771087940 is an apocalyptic number.

27771087940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27771087940 is an abundant number, since it is smaller than the sum of its proper divisors (30580907132).

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

27771087940 is a wasteful number, since it uses less digits than its factorization.

27771087940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 778827 (or 778825 counting only the distinct ones).

The product of its (nonzero) digits is 1382976, while the sum is 52.

The spelling of 27771087940 in words is "twenty-seven billion, seven hundred seventy-one million, eighty-seven thousand, nine hundred forty".