127640198 has 24 divisors (see below), whose sum is σ = 223206984. Its totient is φ = 54583200.

The previous prime is 127640197. The next prime is 127640209. The reversal of 127640198 is 891046721.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127640197) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54818 + ... + 57098.

It is an arithmetic number, because the mean of its divisors is an integer number (9300291).

Almost surely, 2^127640198 is an apocalyptic number.

127640198 is a deficient number, since it is larger than the sum of its proper divisors (95566786).

127640198 is a wasteful number, since it uses less digits than its factorization.

127640198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2868 (or 2861 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 127640198 is about 11297.7961567732. The cubic root of 127640198 is about 503.4957662768.

The spelling of 127640198 in words is "one hundred twenty-seven million, six hundred forty thousand, one hundred ninety-eight".