128283078940 has 24 divisors (see below), whose sum is σ = 273415281552. Its totient is φ = 50547361920.

The previous prime is 128283078881. The next prime is 128283078941. The reversal of 128283078940 is 49870382821.

It is a happy number.

It is a super-3 number, since 3×128283078940³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128283078941) 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 7 ways as a sum of consecutive naturals, for example, 47865481 + ... + 47868160.

It is an arithmetic number, because the mean of its divisors is an integer number (11392303398).

Almost surely, 2^128283078940 is an apocalyptic number.

128283078940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128283078940 is an abundant number, since it is smaller than the sum of its proper divisors (145132202612).

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

128283078940 is a wasteful number, since it uses less digits than its factorization.

128283078940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95733717 (or 95733715 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 52.

The spelling of 128283078940 in words is "one hundred twenty-eight billion, two hundred eighty-three million, seventy-eight thousand, nine hundred forty".