127717640 has 32 divisors (see below), whose sum is σ = 291418560. Its totient is φ = 50366400.

The previous prime is 127717637. The next prime is 127717663. The reversal of 127717640 is 46717721.

It is a self number, because there is not a number n which added to its sum of digits gives 127717640.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19646 + ... + 25325.

It is an arithmetic number, because the mean of its divisors is an integer number (9106830).

Almost surely, 2^127717640 is an apocalyptic number.

127717640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

127717640 is an abundant number, since it is smaller than the sum of its proper divisors (163700920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

127717640 is a wasteful number, since it uses less digits than its factorization.

127717640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45053 (or 45049 counting only the distinct ones).

The product of its (nonzero) digits is 16464, while the sum is 35.

The square root of 127717640 is about 11301.2229426731. Note that the first 3 decimals coincide. The cubic root of 127717640 is about 503.5975728568.

The spelling of 127717640 in words is "one hundred twenty-seven million, seven hundred seventeen thousand, six hundred forty".