128750004 has 72 divisors (see below), whose sum is σ = 351012480. Its totient is φ = 39657600.

The previous prime is 128750003. The next prime is 128750029. The reversal of 128750004 is 400057821.

It is a self number, because there is not a number n which added to its sum of digits gives 128750004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128750003) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25749 + ... + 30339.

Almost surely, 2^128750004 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128750004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (175506240).

128750004 is an abundant number, since it is smaller than the sum of its proper divisors (222262476).

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

128750004 is a wasteful number, since it uses less digits than its factorization.

128750004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4661 (or 4656 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 128750004 is about 11346.8058941713. The cubic root of 128750004 is about 504.9508222542.

The spelling of 128750004 in words is "one hundred twenty-eight million, seven hundred fifty thousand, four".