128393292 has 18 divisors (see below), whose sum is σ = 299675964. Its totient is φ = 42784680.

The previous prime is 128393273. The next prime is 128393297. The reversal of 128393292 is 292393821.

It is a self number, because there is not a number n which added to its sum of digits gives 128393292.

It is not an unprimeable number, because it can be changed into a prime (128393297) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 37617 + ... + 40887.

Almost surely, 2^128393292 is an apocalyptic number.

128393292 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

128393292 is an abundant number, since it is smaller than the sum of its proper divisors (171282672).

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

128393292 is an frugal number, since it uses more digits than its factorization.

128393292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6549 (or 3276 counting only the distinct ones).

The product of its digits is 46656, while the sum is 39.

The square root of 128393292 is about 11331.0763831156. The cubic root of 128393292 is about 504.4840556108.

The spelling of 128393292 in words is "one hundred twenty-eight million, three hundred ninety-three thousand, two hundred ninety-two".