128617904 has 20 divisors (see below), whose sum is σ = 249373176. Its totient is φ = 64263552.

The previous prime is 128617901. The next prime is 128617919. The reversal of 128617904 is 409716821.

It is not an unprimeable number, because it can be changed into a prime (128617901) 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, 41927 + ... + 44889.

Almost surely, 2^128617904 is an apocalyptic number.

It is an amenable number.

128617904 is a deficient number, since it is larger than the sum of its proper divisors (120755272).

128617904 is a wasteful number, since it uses less digits than its factorization.

128617904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5684 (or 5678 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 128617904 is about 11340.9833788786. The cubic root of 128617904 is about 504.7780667131.

The spelling of 128617904 in words is "one hundred twenty-eight million, six hundred seventeen thousand, nine hundred four".