127728992 has 24 divisors (see below), whose sum is σ = 260139600. Its totient is φ = 61661824.

The previous prime is 127728977. The next prime is 127729013. The reversal of 127728992 is 299827721.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67892 + ... + 69747.

It is an arithmetic number, because the mean of its divisors is an integer number (10839150).

Almost surely, 2^127728992 is an apocalyptic number.

It is an amenable number.

127728992 is an abundant number, since it is smaller than the sum of its proper divisors (132410608).

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

127728992 is a wasteful number, since it uses less digits than its factorization.

127728992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137678 (or 137670 counting only the distinct ones).

The product of its digits is 254016, while the sum is 47.

The square root of 127728992 is about 11301.7251780425. The cubic root of 127728992 is about 503.6124929318.

The spelling of 127728992 in words is "one hundred twenty-seven million, seven hundred twenty-eight thousand, nine hundred ninety-two".