128768592 has 20 divisors (see below), whose sum is σ = 332652320. Its totient is φ = 42922848.

The previous prime is 128768561. The next prime is 128768603. The reversal of 128768592 is 295867821.

It is a Harshad number since it is a multiple of its sum of digits (48), and also a Moran number because the ratio is a prime number: 2682679 = 128768592 / (1 + 2 + 8 + 7 + 6 + 8 + 5 + 9 + 2).

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, 1341292 + ... + 1341387.

It is an arithmetic number, because the mean of its divisors is an integer number (16632616).

Almost surely, 2^128768592 is an apocalyptic number.

128768592 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

128768592 is an abundant number, since it is smaller than the sum of its proper divisors (203883728).

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

128768592 is a wasteful number, since it uses less digits than its factorization.

128768592 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2682690 (or 2682684 counting only the distinct ones).

The product of its digits is 483840, while the sum is 48.

The square root of 128768592 is about 11347.6249497417. The cubic root of 128768592 is about 504.9751214748.

The spelling of 128768592 in words is "one hundred twenty-eight million, seven hundred sixty-eight thousand, five hundred ninety-two".