127638385 has 24 divisors (see below), whose sum is σ = 185927616. Its totient is φ = 83714400.

The previous prime is 127638373. The next prime is 127638389. The reversal of 127638385 is 583836721.

It is not a de Polignac number, because 127638385 - 2¹⁷ = 127507313 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (127638389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5691 + ... + 16960.

It is an arithmetic number, because the mean of its divisors is an integer number (7746984).

Almost surely, 2^127638385 is an apocalyptic number.

It is an amenable number.

127638385 is a deficient number, since it is larger than the sum of its proper divisors (58289231).

127638385 is a wasteful number, since it uses less digits than its factorization.

127638385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22693 (or 22686 counting only the distinct ones).

The product of its digits is 241920, while the sum is 43.

The square root of 127638385 is about 11297.7159196007. The cubic root of 127638385 is about 503.4933823827.

The spelling of 127638385 in words is "one hundred twenty-seven million, six hundred thirty-eight thousand, three hundred eighty-five".