128165704 has 8 divisors (see below), whose sum is σ = 240310710. Its totient is φ = 64082848.

The previous prime is 128165701. The next prime is 128165711. The reversal of 128165704 is 407561821.

It can be written as a sum of positive squares in only one way, i.e., 117288900 + 10876804 = 10830^2 + 3298^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 128165704.

It is not an unprimeable number, because it can be changed into a prime (128165701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8010349 + ... + 8010364.

Almost surely, 2^128165704 is an apocalyptic number.

It is an amenable number.

128165704 is a deficient number, since it is larger than the sum of its proper divisors (112145006).

128165704 is a wasteful number, since it uses less digits than its factorization.

128165704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16020719 (or 16020715 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 128165704 is about 11321.0292818277. The cubic root of 128165704 is about 504.1857990539.

The spelling of 128165704 in words is "one hundred twenty-eight million, one hundred sixty-five thousand, seven hundred four".