27128143988 has 24 divisors (see below), whose sum is σ = 54515889120. Its totient is φ = 11681975520.

The previous prime is 27128143961. The next prime is 27128143993. The reversal of 27128143988 is 88934182172.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16224131 + ... + 16225802.

It is an arithmetic number, because the mean of its divisors is an integer number (2271495380).

Almost surely, 2^27128143988 is an apocalyptic number.

It is an amenable number.

27128143988 is an abundant number, since it is smaller than the sum of its proper divisors (27387745132).

27128143988 is a wasteful number, since it uses less digits than its factorization.

27128143988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32449967 (or 32449965 counting only the distinct ones).

The product of its digits is 1548288, while the sum is 53.

The spelling of 27128143988 in words is "twenty-seven billion, one hundred twenty-eight million, one hundred forty-three thousand, nine hundred eighty-eight".