128432070 has 96 divisors (see below), whose sum is σ = 371314944. Its totient is φ = 30585600.

The previous prime is 128432063. The next prime is 128432089. The reversal of 128432070 is 70234821.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 34500 + ... + 38040.

It is an arithmetic number, because the mean of its divisors is an integer number (3867864).

Almost surely, 2^128432070 is an apocalyptic number.

128432070 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 128432070, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (185657472).

128432070 is an abundant number, since it is smaller than the sum of its proper divisors (242882874).

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

128432070 is a wasteful number, since it uses less digits than its factorization.

128432070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3598 (or 3595 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 128432070 is about 11332.7873888113. The cubic root of 128432070 is about 504.5348394517.

Adding to 128432070 its reverse (70234821), we get a palindrome (198666891).

The spelling of 128432070 in words is "one hundred twenty-eight million, four hundred thirty-two thousand, seventy".