128990033540 has 24 divisors (see below), whose sum is σ = 271170690840. Its totient is φ = 51540466688.

The previous prime is 128990033533. The next prime is 128990033563. The reversal of 128990033540 is 45330099821.

It can be written as a sum of positive squares in 4 ways, for example, as 4730963524 + 124259070016 = 68782^2 + 352504^2 .

It is a junction number, because it is equal to n+sod(n) for n = 128990033491 and 128990033500.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3452627 + ... + 3489786.

It is an arithmetic number, because the mean of its divisors is an integer number (11298778785).

Almost surely, 2^128990033540 is an apocalyptic number.

128990033540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128990033540 is an abundant number, since it is smaller than the sum of its proper divisors (142180657300).

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

128990033540 is a wasteful number, since it uses less digits than its factorization.

128990033540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6943351 (or 6943349 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 44.

The spelling of 128990033540 in words is "one hundred twenty-eight billion, nine hundred ninety million, thirty-three thousand, five hundred forty".