128763396 has 18 divisors (see below), whose sum is σ = 325485342. Its totient is φ = 42921120.

The previous prime is 128763379. The next prime is 128763403. The reversal of 128763396 is 693367821.

128763396 is a `hidden beast` number, since 1 + 2 + 8 + 7 + 633 + 9 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 87160896 + 41602500 = 9336^2 + 6450^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1788345 + ... + 1788416.

It is an arithmetic number, because the mean of its divisors is an integer number (18082519).

Almost surely, 2^128763396 is an apocalyptic number.

It is an amenable number.

128763396 is an abundant number, since it is smaller than the sum of its proper divisors (196721946).

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

128763396 is a wasteful number, since it uses less digits than its factorization.

128763396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3576771 (or 3576766 counting only the distinct ones).

The product of its digits is 326592, while the sum is 45.

The square root of 128763396 is about 11347.3960008453. The cubic root of 128763396 is about 504.9683292232.

The spelling of 128763396 in words is "one hundred twenty-eight million, seven hundred sixty-three thousand, three hundred ninety-six".