127728634 has 8 divisors (see below), whose sum is σ = 209010528. Its totient is φ = 58058460.

The previous prime is 127728613. The next prime is 127728641. The reversal of 127728634 is 436827721.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 2902902 + ... + 2902945.

It is an arithmetic number, because the mean of its divisors is an integer number (26126316).

Almost surely, 2^127728634 is an apocalyptic number.

127728634 is a deficient number, since it is larger than the sum of its proper divisors (81281894).

127728634 is a wasteful number, since it uses less digits than its factorization.

127728634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5805860.

The product of its digits is 112896, while the sum is 40.

The square root of 127728634 is about 11301.7093397415. The cubic root of 127728634 is about 503.6120224214.

The spelling of 127728634 in words is "one hundred twenty-seven million, seven hundred twenty-eight thousand, six hundred thirty-four".