128425500 has 288 divisors, whose sum is σ = 483345408. Its totient is φ = 29160000.

The previous prime is 128425459. The next prime is 128425513. The reversal of 128425500 is 5524821.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 850425 + ... + 850575.

Almost surely, 2^128425500 is an apocalyptic number.

128425500 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 128425500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (241672704).

128425500 is an abundant number, since it is smaller than the sum of its proper divisors (354919908).

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

128425500 is a wasteful number, since it uses less digits than its factorization.

128425500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192 (or 168 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 128425500 is about 11332.4975181996. The cubic root of 128425500 is about 504.5262360699.

The spelling of 128425500 in words is "one hundred twenty-eight million, four hundred twenty-five thousand, five hundred".