128839516 has 18 divisors (see below), whose sum is σ = 244148352. Its totient is φ = 59464080.

The previous prime is 128839493. The next prime is 128839519. The reversal of 128839516 is 615938821.

It is a super-2 number, since 2×128839516² = 33199241766228512, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128839519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 94620 + ... + 95971.

Almost surely, 2^128839516 is an apocalyptic number.

It is an amenable number.

128839516 is a deficient number, since it is larger than the sum of its proper divisors (115308836).

128839516 is a wasteful number, since it uses less digits than its factorization.

128839516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190621 (or 190606 counting only the distinct ones).

The product of its digits is 103680, while the sum is 43.

The square root of 128839516 is about 11350.7495787723. The cubic root of 128839516 is about 505.0678156158.

It can be divided in two parts, 1288 and 39516, that added together give a palindrome (40804).

The spelling of 128839516 in words is "one hundred twenty-eight million, eight hundred thirty-nine thousand, five hundred sixteen".