127991536 has 20 divisors (see below), whose sum is σ = 248167152. Its totient is φ = 63948416.

The previous prime is 127991509. The next prime is 127991551. The reversal of 127991536 is 635199721.

It is a junction number, because it is equal to n+sod(n) for n = 127991492 and 127991501.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31476 + ... + 35308.

Almost surely, 2^127991536 is an apocalyptic number.

127991536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

127991536 is a deficient number, since it is larger than the sum of its proper divisors (120175616).

127991536 is a wasteful number, since it uses less digits than its factorization.

127991536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5928 (or 5922 counting only the distinct ones).

The product of its digits is 102060, while the sum is 43.

The square root of 127991536 is about 11313.3344333136. The cubic root of 127991536 is about 503.9573114092.

The spelling of 127991536 in words is "one hundred twenty-seven million, nine hundred ninety-one thousand, five hundred thirty-six".