127729216 has 14 divisors (see below), whose sum is σ = 253462790. Its totient is φ = 63864576.

The previous prime is 127729183. The next prime is 127729223. The reversal of 127729216 is 612927721.

It can be written as a sum of positive squares in only one way, i.e., 127599616 + 129600 = 11296^2 + 360^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 997821 + ... + 997948.

It is an arithmetic number, because the mean of its divisors is an integer number (18104485).

Almost surely, 2^127729216 is an apocalyptic number.

127729216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

127729216 is a deficient number, since it is larger than the sum of its proper divisors (125733574).

127729216 is an equidigital number, since it uses as much as digits as its factorization.

127729216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1995781 (or 1995771 counting only the distinct ones).

The product of its digits is 21168, while the sum is 37.

The square root of 127729216 is about 11301.7350880296. The cubic root of 127729216 is about 503.6127873288.

The spelling of 127729216 in words is "one hundred twenty-seven million, seven hundred twenty-nine thousand, two hundred sixteen".