127720530 has 64 divisors (see below), whose sum is σ = 389249280. Its totient is φ = 29192832.

The previous prime is 127720517. The next prime is 127720531. The reversal of 127720530 is 35027721.

127720530 is a `hidden beast` number, since 127 + 7 + 2 + 0 + 530 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 127720494 and 127720503.

It is not an unprimeable number, because it can be changed into a prime (127720531) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31899 + ... + 35678.

It is an arithmetic number, because the mean of its divisors is an integer number (6082020).

Almost surely, 2^127720530 is an apocalyptic number.

127720530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

127720530 is an abundant number, since it is smaller than the sum of its proper divisors (261528750).

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

127720530 is a wasteful number, since it uses less digits than its factorization.

127720530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67600 (or 67594 counting only the distinct ones).

The product of its (nonzero) digits is 2940, while the sum is 27.

The square root of 127720530 is about 11301.3508042181. The cubic root of 127720530 is about 503.6013713037.

The spelling of 127720530 in words is "one hundred twenty-seven million, seven hundred twenty thousand, five hundred thirty".