128819682 has 24 divisors (see below), whose sum is σ = 288734940. Its totient is φ = 41459040.

The previous prime is 128819671. The next prime is 128819687. The reversal of 128819682 is 286918821.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 128799801 + 19881 = 11349^2 + 141^2 .

It is a super-2 number, since 2×128819682² = 33189020941162248, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (128819687) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 122869 + ... + 123912.

Almost surely, 2^128819682 is an apocalyptic number.

128819682 is an abundant number, since it is smaller than the sum of its proper divisors (159915258).

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

128819682 is a wasteful number, since it uses less digits than its factorization.

128819682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246818 (or 246815 counting only the distinct ones).

The product of its digits is 110592, while the sum is 45.

The square root of 128819682 is about 11349.8758583519. The cubic root of 128819682 is about 505.0418969912.

The spelling of 128819682 in words is "one hundred twenty-eight million, eight hundred nineteen thousand, six hundred eighty-two".