127172728 has 8 divisors (see below), whose sum is σ = 238448880. Its totient is φ = 63586360.

The previous prime is 127172713. The next prime is 127172729. The reversal of 127172728 is 827271721.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127172729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7948288 + ... + 7948303.

It is an arithmetic number, because the mean of its divisors is an integer number (29806110).

Almost surely, 2^127172728 is an apocalyptic number.

It is an amenable number.

127172728 is a deficient number, since it is larger than the sum of its proper divisors (111276152).

127172728 is a wasteful number, since it uses less digits than its factorization.

127172728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15896597 (or 15896593 counting only the distinct ones).

The product of its digits is 21952, while the sum is 37.

The square root of 127172728 is about 11277.0886313800. The cubic root of 127172728 is about 502.8803460183.

The spelling of 127172728 in words is "one hundred twenty-seven million, one hundred seventy-two thousand, seven hundred twenty-eight".