128381496 has 32 divisors (see below), whose sum is σ = 328784400. Its totient is φ = 41749760.

The previous prime is 128381471. The next prime is 128381497. The reversal of 128381496 is 694183821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128381497) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64251 + ... + 66218.

Almost surely, 2^128381496 is an apocalyptic number.

It is an amenable number.

128381496 is an abundant number, since it is smaller than the sum of its proper divisors (200402904).

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

128381496 is a wasteful number, since it uses less digits than its factorization.

128381496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130519 (or 130515 counting only the distinct ones).

The product of its digits is 82944, while the sum is 42.

The square root of 128381496 is about 11330.5558557381. Note that the first 3 decimals coincide. The cubic root of 128381496 is about 504.4686054886.

The spelling of 128381496 in words is "one hundred twenty-eight million, three hundred eighty-one thousand, four hundred ninety-six".