128942387200 has 156 divisors (see below), whose sum is σ = 348808230648. Its totient is φ = 46887731200.

The previous prime is 128942387179. The next prime is 128942387261. The reversal of 128942387200 is 2783249821.

It is a super-2 number, since 2×128942387200² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1069164 + ... + 1183636.

Almost surely, 2^128942387200 is an apocalyptic number.

128942387200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128942387200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (174404115324).

128942387200 is an abundant number, since it is smaller than the sum of its proper divisors (219865843448).

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

128942387200 is a wasteful number, since it uses less digits than its factorization.

128942387200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114518 (or 114491 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 46.

The spelling of 128942387200 in words is "one hundred twenty-eight billion, nine hundred forty-two million, three hundred eighty-seven thousand, two hundred".