128907247500 has 540 divisors, whose sum is σ = 439014095520. Its totient is φ = 33067440000.

The previous prime is 128907247453. The next prime is 128907247507. The reversal of 128907247500 is 5742709821.

It is a happy number.

128907247500 is a `hidden beast` number, since 1 + 28 + 90 + 72 + 475 + 0 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (540).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (128907247507) by changing a digit.

It is a polite number, since it can be written in 179 ways as a sum of consecutive naturals, for example, 475672365 + ... + 475672635.

Almost surely, 2^128907247500 is an apocalyptic number.

128907247500 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 128907247500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (219507047760).

128907247500 is an abundant number, since it is smaller than the sum of its proper divisors (310106848020).

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

128907247500 is an frugal number, since it uses more digits than its factorization.

128907247500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348 (or 310 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 45.

The spelling of 128907247500 in words is "one hundred twenty-eight billion, nine hundred seven million, two hundred forty-seven thousand, five hundred".