128867392 has 14 divisors (see below), whose sum is σ = 255721358. Its totient is φ = 64433664.

The previous prime is 128867363. The next prime is 128867393. The reversal of 128867392 is 293768821.

It can be written as a sum of positive squares in only one way, i.e., 119771136 + 9096256 = 10944^2 + 3016^2 .

It is not an unprimeable number, because it can be changed into a prime (128867393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1006713 + ... + 1006840.

Almost surely, 2^128867392 is an apocalyptic number.

It is an amenable number.

128867392 is a deficient number, since it is larger than the sum of its proper divisors (126853966).

128867392 is an equidigital number, since it uses as much as digits as its factorization.

128867392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2013565 (or 2013555 counting only the distinct ones).

The product of its digits is 290304, while the sum is 46.

The square root of 128867392 is about 11351.9774488853. The cubic root of 128867392 is about 505.1042388488.

The spelling of 128867392 in words is "one hundred twenty-eight million, eight hundred sixty-seven thousand, three hundred ninety-two".