128993592 has 64 divisors (see below), whose sum is σ = 396910080. Its totient is φ = 34019712.

The previous prime is 128993539. The next prime is 128993609. The reversal of 128993592 is 295399821.

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, 27348 + ... + 31715.

It is an arithmetic number, because the mean of its divisors is an integer number (6201720).

Almost surely, 2^128993592 is an apocalyptic number.

128993592 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

128993592 is an abundant number, since it is smaller than the sum of its proper divisors (267916488).

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

128993592 is a wasteful number, since it uses less digits than its factorization.

128993592 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59092 (or 59088 counting only the distinct ones).

The product of its digits is 349920, while the sum is 48.

The square root of 128993592 is about 11357.5345916268. The cubic root of 128993592 is about 505.2690681281.

The spelling of 128993592 in words is "one hundred twenty-eight million, nine hundred ninety-three thousand, five hundred ninety-two".