128015424 has 112 divisors (see below), whose sum is σ = 392826240. Its totient is φ = 40803840.

The previous prime is 128015417. The next prime is 128015443. The reversal of 128015424 is 424510821.

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

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 15 ways as a sum of consecutive naturals, for example, 38134 + ... + 41354.

Almost surely, 2^128015424 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 128015424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (196413120).

128015424 is an abundant number, since it is smaller than the sum of its proper divisors (264810816).

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

128015424 is a wasteful number, since it uses less digits than its factorization.

128015424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3265 (or 3249 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 27.

The square root of 128015424 is about 11314.3901293883. The cubic root of 128015424 is about 503.9886618765.

It can be divided in two parts, 12801 and 5424, that added together give a square (18225 = 135²).

The spelling of 128015424 in words is "one hundred twenty-eight million, fifteen thousand, four hundred twenty-four".