128633396 has 6 divisors (see below), whose sum is σ = 225108450. Its totient is φ = 64316696.

The previous prime is 128633389. The next prime is 128633399. The reversal of 128633396 is 693336821.

It can be written as a sum of positive squares in only one way, i.e., 81902500 + 46730896 = 9050^2 + 6836^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128633399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16079171 + ... + 16079178.

It is an arithmetic number, because the mean of its divisors is an integer number (37518075).

Almost surely, 2^128633396 is an apocalyptic number.

It is an amenable number.

128633396 is a deficient number, since it is larger than the sum of its proper divisors (96475054).

128633396 is a wasteful number, since it uses less digits than its factorization.

128633396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32158353 (or 32158351 counting only the distinct ones).

The product of its digits is 139968, while the sum is 41.

The square root of 128633396 is about 11341.6663678668. Note that the first 3 decimals coincide. The cubic root of 128633396 is about 504.7983327041.

The spelling of 128633396 in words is "one hundred twenty-eight million, six hundred thirty-three thousand, three hundred ninety-six".