127981668 has 24 divisors (see below), whose sum is σ = 306695872. Its totient is φ = 41507424.

The previous prime is 127981657. The next prime is 127981673. The reversal of 127981668 is 866189721.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

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, 143680 + ... + 144567.

Almost surely, 2^127981668 is an apocalyptic number.

It is an amenable number.

127981668 is an abundant number, since it is smaller than the sum of its proper divisors (178714204).

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

127981668 is a wasteful number, since it uses less digits than its factorization.

127981668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288291 (or 288289 counting only the distinct ones).

The product of its digits is 290304, while the sum is 48.

The square root of 127981668 is about 11312.8983023803. The cubic root of 127981668 is about 503.9443595669.

The spelling of 127981668 in words is "one hundred twenty-seven million, nine hundred eighty-one thousand, six hundred sixty-eight".