128039446276 has 81 divisors (see below), whose sum is σ = 265628713077. Its totient is φ = 53845656480.

The previous prime is 128039446229. The next prime is 128039446321. The reversal of 128039446276 is 672644930821.

The square root of 128039446276 is 357826.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 4163604676 + 123875841600 = 64526^2 + 351960^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 305583195 + ... + 305583613.

Almost surely, 2^128039446276 is an apocalyptic number.

128039446276 is the 357826-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128039446276

128039446276 is an abundant number, since it is smaller than the sum of its proper divisors (137589266801).

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

128039446276 is an frugal number, since it uses more digits than its factorization.

128039446276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 978 (or 489 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 52.

The spelling of 128039446276 in words is "one hundred twenty-eight billion, thirty-nine million, four hundred forty-six thousand, two hundred seventy-six".