27788288772 has 48 divisors (see below), whose sum is σ = 67593705984. Its totient is φ = 8875200000.

The previous prime is 27788288767. The next prime is 27788288783.

It is a happy number.

27788288772 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×27788288772² (a number of 22 digits) contains 22 as substring.

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, 332229 + ... + 407372.

It is an arithmetic number, because the mean of its divisors is an integer number (1408202208).

Almost surely, 2^27788288772 is an apocalyptic number.

It is an amenable number.

27788288772 is an abundant number, since it is smaller than the sum of its proper divisors (39805417212).

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

27788288772 is a wasteful number, since it uses less digits than its factorization.

27788288772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 739740 (or 739738 counting only the distinct ones).

The product of its digits is 78675968, while the sum is 66.

The spelling of 27788288772 in words is "twenty-seven billion, seven hundred eighty-eight million, two hundred eighty-eight thousand, seven hundred seventy-two".