128727612 has 36 divisors (see below), whose sum is σ = 350426440. Its totient is φ = 39608352.

The previous prime is 128727601. The next prime is 128727617. The reversal of 128727612 is 216727821.

128727612 is a `hidden beast` number, since 12 + 8 + 7 + 27 + 612 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128727617) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 137062 + ... + 137997.

Almost surely, 2^128727612 is an apocalyptic number.

128727612 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

128727612 is an abundant number, since it is smaller than the sum of its proper divisors (221698828).

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

128727612 is a wasteful number, since it uses less digits than its factorization.

128727612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275082 (or 275077 counting only the distinct ones).

The product of its digits is 18816, while the sum is 36.

The square root of 128727612 is about 11345.8191418690. The cubic root of 128727612 is about 504.9215471371.

The spelling of 128727612 in words is "one hundred twenty-eight million, seven hundred twenty-seven thousand, six hundred twelve".