128403964 has 48 divisors (see below), whose sum is σ = 249923520. Its totient is φ = 57346560.

The previous prime is 128403931. The next prime is 128403983. The reversal of 128403964 is 469304821.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 488097 + ... + 488359.

It is an arithmetic number, because the mean of its divisors is an integer number (5206740).

Almost surely, 2^128403964 is an apocalyptic number.

It is an amenable number.

128403964 is a deficient number, since it is larger than the sum of its proper divisors (121519556).

128403964 is a wasteful number, since it uses less digits than its factorization.

128403964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550 (or 548 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 128403964 is about 11331.5472906395. The cubic root of 128403964 is about 504.4980327291.

The spelling of 128403964 in words is "one hundred twenty-eight million, four hundred three thousand, nine hundred sixty-four".