127640407228 has 24 divisors (see below), whose sum is σ = 223823174400. Its totient is φ = 63691015728.

The previous prime is 127640407207. The next prime is 127640407289. The reversal of 127640407228 is 822704046721.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6970701 + ... + 6988987.

It is an arithmetic number, because the mean of its divisors is an integer number (9325965600).

Almost surely, 2^127640407228 is an apocalyptic number.

It is an amenable number.

127640407228 is a deficient number, since it is larger than the sum of its proper divisors (96182767172).

127640407228 is a wasteful number, since it uses less digits than its factorization.

127640407228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21729 (or 21727 counting only the distinct ones).

The product of its (nonzero) digits is 301056, while the sum is 43.

The spelling of 127640407228 in words is "one hundred twenty-seven billion, six hundred forty million, four hundred seven thousand, two hundred twenty-eight".