128304671 has 16 divisors (see below), whose sum is σ = 145981440. Its totient is φ = 111696480.

The previous prime is 128304667. The next prime is 128304697. The reversal of 128304671 is 176403821.

It is a cyclic number.

It is not a de Polignac number, because 128304671 - 2² = 128304667 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128304571) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38930 + ... + 42096.

It is an arithmetic number, because the mean of its divisors is an integer number (9123840).

Almost surely, 2^128304671 is an apocalyptic number.

128304671 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

128304671 is a deficient number, since it is larger than the sum of its proper divisors (17676769).

128304671 is a wasteful number, since it uses less digits than its factorization.

128304671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3334.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 128304671 is about 11327.1651793377. The cubic root of 128304671 is about 504.3679587572.

The spelling of 128304671 in words is "one hundred twenty-eight million, three hundred four thousand, six hundred seventy-one".