128380279452 has 36 divisors (see below), whose sum is σ = 309899567880. Its totient is φ = 41315639904.

The previous prime is 128380279427. The next prime is 128380279453. The reversal of 128380279452 is 254972083821.

It is a super-3 number, since 3×128380279452³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 128380279395 and 128380279404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128380279453) 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, 6674433 + ... + 6693639.

It is an arithmetic number, because the mean of its divisors is an integer number (8608321330).

Almost surely, 2^128380279452 is an apocalyptic number.

128380279452 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

128380279452 is an abundant number, since it is smaller than the sum of its proper divisors (181519288428).

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

128380279452 is an frugal number, since it uses more digits than its factorization.

128380279452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38450 (or 19241 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 51.

The spelling of 128380279452 in words is "one hundred twenty-eight billion, three hundred eighty million, two hundred seventy-nine thousand, four hundred fifty-two".