128683628 has 12 divisors (see below), whose sum is σ = 226499280. Its totient is φ = 63969552.

The previous prime is 128683571. The next prime is 128683651. The reversal of 128683628 is 826386821.

It is a super-2 number, since 2×128683628² = 33118952230484768, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92288 + ... + 93671.

It is an arithmetic number, because the mean of its divisors is an integer number (18874940).

Almost surely, 2^128683628 is an apocalyptic number.

It is an amenable number.

128683628 is a deficient number, since it is larger than the sum of its proper divisors (97815652).

128683628 is a wasteful number, since it uses less digits than its factorization.

It is an anagram of its base 9 representation: 128683628 = (288123668)₉.

128683628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186136 (or 186134 counting only the distinct ones).

The product of its digits is 221184, while the sum is 44.

The square root of 128683628 is about 11343.8806411210. The cubic root of 128683628 is about 504.8640329309.

The spelling of 128683628 in words is "one hundred twenty-eight million, six hundred eighty-three thousand, six hundred twenty-eight".