128486634 has 16 divisors (see below), whose sum is σ = 258936480. Its totient is φ = 42501680.

The previous prime is 128486621. The next prime is 128486707. The reversal of 128486634 is 436684821.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80949 + ... + 82520.

It is an arithmetic number, because the mean of its divisors is an integer number (16183530).

Almost surely, 2^128486634 is an apocalyptic number.

128486634 is an abundant number, since it is smaller than the sum of its proper divisors (130449846).

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

128486634 is a wasteful number, since it uses less digits than its factorization.

128486634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163605.

The product of its digits is 221184, while the sum is 42.

The square root of 128486634 is about 11335.1944844365. The cubic root of 128486634 is about 504.6062794000.

The spelling of 128486634 in words is "one hundred twenty-eight million, four hundred eighty-six thousand, six hundred thirty-four".