127977028 has 12 divisors (see below), whose sum is σ = 224077840. Its totient is φ = 63954792.

The previous prime is 127977013. The next prime is 127977041. The reversal of 127977028 is 820779721.

It is a happy number.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1375 + ... + 16057.

Almost surely, 2^127977028 is an apocalyptic number.

It is an amenable number.

127977028 is a deficient number, since it is larger than the sum of its proper divisors (96100812).

127977028 is a wasteful number, since it uses less digits than its factorization.

127977028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16866 (or 16864 counting only the distinct ones).

The product of its (nonzero) digits is 98784, while the sum is 43.

The square root of 127977028 is about 11312.6932248691. The cubic root of 127977028 is about 503.9382692934.

The spelling of 127977028 in words is "one hundred twenty-seven million, nine hundred seventy-seven thousand, twenty-eight".