128158712 has 64 divisors (see below), whose sum is σ = 273715200. Its totient is φ = 55728000.

The previous prime is 128158703. The next prime is 128158721. The reversal of 128158712 is 217851821.

It is an interprime number because it is at equal distance from previous prime (128158703) and next prime (128158721).

It is a super-2 number, since 2×128158712² = 32849310922997888, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 297137 + ... + 297567.

It is an arithmetic number, because the mean of its divisors is an integer number (4276800).

Almost surely, 2^128158712 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128158712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (136857600).

128158712 is an abundant number, since it is smaller than the sum of its proper divisors (145556488).

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

128158712 is a wasteful number, since it uses less digits than its factorization.

128158712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 588 (or 584 counting only the distinct ones).

The product of its digits is 8960, while the sum is 35.

The square root of 128158712 is about 11320.7204717721. The cubic root of 128158712 is about 504.1766303733.

The spelling of 128158712 in words is "one hundred twenty-eight million, one hundred fifty-eight thousand, seven hundred twelve".