128692308 has 12 divisors (see below), whose sum is σ = 300282080. Its totient is φ = 42897432.

The previous prime is 128692307. The next prime is 128692331. The reversal of 128692308 is 803296821.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128692303) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5362168 + ... + 5362191.

Almost surely, 2^128692308 is an apocalyptic number.

It is an amenable number.

128692308 is an abundant number, since it is smaller than the sum of its proper divisors (171589772).

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

128692308 is a wasteful number, since it uses less digits than its factorization.

128692308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10724366 (or 10724364 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 128692308 is about 11344.2632197953. The cubic root of 128692308 is about 504.8753840804.

The spelling of 128692308 in words is "one hundred twenty-eight million, six hundred ninety-two thousand, three hundred eight".