128404616 has 16 divisors (see below), whose sum is σ = 242969100. Its totient is φ = 63612864.

The previous prime is 128404609. The next prime is 128404657. The reversal of 128404616 is 616404821.

It can be written as a sum of positive squares in 2 ways, for example, as 126472516 + 1932100 = 11246^2 + 1390^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72755 + ... + 74498.

Almost surely, 2^128404616 is an apocalyptic number.

It is an amenable number.

128404616 is a deficient number, since it is larger than the sum of its proper divisors (114564484).

128404616 is a wasteful number, since it uses less digits than its factorization.

128404616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147368 (or 147364 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 128404616 is about 11331.5760598427. The cubic root of 128404616 is about 504.4988866284.

The spelling of 128404616 in words is "one hundred twenty-eight million, four hundred four thousand, six hundred sixteen".