128787196 has 12 divisors (see below), whose sum is σ = 225545320. Its totient is φ = 64345680.

The previous prime is 128787161. The next prime is 128787203. The reversal of 128787196 is 691787821.

It is a super-2 number, since 2×128787196² = 33172283707084832, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5550 + ... + 16981.

Almost surely, 2^128787196 is an apocalyptic number.

It is an amenable number.

128787196 is a deficient number, since it is larger than the sum of its proper divisors (96758124).

128787196 is a wasteful number, since it uses less digits than its factorization.

128787196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23964 (or 23962 counting only the distinct ones).

The product of its digits is 338688, while the sum is 49.

The square root of 128787196 is about 11348.4446511405. Note that the first 3 decimals coincide. The cubic root of 128787196 is about 504.9994392700. Note that the first 3 decimals are identical.

The spelling of 128787196 in words is "one hundred twenty-eight million, seven hundred eighty-seven thousand, one hundred ninety-six".