128284704 has 36 divisors (see below), whose sum is σ = 364810446. Its totient is φ = 42761472.

The previous prime is 128284697. The next prime is 128284721. The reversal of 128284704 is 407482821.

It can be written as a sum of positive squares in only one way, i.e., 125888400 + 2396304 = 11220^2 + 1548^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-3 number, since 3×128284704³ (a number of 25 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 222429 + ... + 223004.

Almost surely, 2^128284704 is an apocalyptic number.

It is an amenable number.

128284704 is an abundant number, since it is smaller than the sum of its proper divisors (236525742).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128284704 is a wasteful number, since it uses less digits than its factorization.

128284704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 445449 (or 445438 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 36.

The square root of 128284704 is about 11326.2837682975. The cubic root of 128284704 is about 504.3417938550.

The spelling of 128284704 in words is "one hundred twenty-eight million, two hundred eighty-four thousand, seven hundred four".