128943992 has 16 divisors (see below), whose sum is σ = 242150040. Its totient is φ = 64370656.

The previous prime is 128943977. The next prime is 128944007. The reversal of 128943992 is 299349821.

It is an interprime number because it is at equal distance from previous prime (128943977) and next prime (128944007).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7118 + ... + 17565.

Almost surely, 2^128943992 is an apocalyptic number.

It is an amenable number.

128943992 is a deficient number, since it is larger than the sum of its proper divisors (113206048).

128943992 is a wasteful number, since it uses less digits than its factorization.

128943992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25342 (or 25338 counting only the distinct ones).

The product of its digits is 279936, while the sum is 47.

The square root of 128943992 is about 11355.3508092000. The cubic root of 128943992 is about 505.2042986093.

The spelling of 128943992 in words is "one hundred twenty-eight million, nine hundred forty-three thousand, nine hundred ninety-two".