128419072 has 18 divisors (see below), whose sum is σ = 256337018. Its totient is φ = 64209408.

The previous prime is 128419013. The next prime is 128419073. The reversal of 128419072 is 270914821.

It can be written as a sum of positive squares in only one way, i.e., 113550336 + 14868736 = 10656^2 + 3856^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128419073) by changing a digit.

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 as a sum of consecutive naturals, namely, 250563 + ... + 251074.

Almost surely, 2^128419072 is an apocalyptic number.

It is an amenable number.

128419072 is a deficient number, since it is larger than the sum of its proper divisors (127917946).

128419072 is an frugal number, since it uses more digits than its factorization.

128419072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501653 (or 501639 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 128419072 is about 11332.2139054997. The cubic root of 128419072 is about 504.5178183523.

The spelling of 128419072 in words is "one hundred twenty-eight million, four hundred nineteen thousand, seventy-two".