127856720 has 20 divisors (see below), whose sum is σ = 297267060. Its totient is φ = 51142656.

The previous prime is 127856713. The next prime is 127856753. The reversal of 127856720 is 27658721.

It can be written as a sum of positive squares in 2 ways, for example, as 93470224 + 34386496 = 9668^2 + 5864^2 .

It is a tau number, because it is divible by the number of its divisors (20).

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, 799025 + ... + 799184.

It is an arithmetic number, because the mean of its divisors is an integer number (14863353).

Almost surely, 2^127856720 is an apocalyptic number.

127856720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

127856720 is an abundant number, since it is smaller than the sum of its proper divisors (169410340).

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

127856720 is a wasteful number, since it uses less digits than its factorization.

127856720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1598222 (or 1598216 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 38.

The square root of 127856720 is about 11307.3745847566. The cubic root of 127856720 is about 503.7803065340.

The spelling of 127856720 in words is "one hundred twenty-seven million, eight hundred fifty-six thousand, seven hundred twenty".