128389072 has 20 divisors (see below), whose sum is σ = 284290336. Its totient is φ = 55023840.

The previous prime is 128389031. The next prime is 128389091. The reversal of 128389072 is 270983821.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 573054 + ... + 573277.

Almost surely, 2^128389072 is an apocalyptic number.

It is an amenable number.

128389072 is an abundant number, since it is smaller than the sum of its proper divisors (155901264).

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

128389072 is a wasteful number, since it uses less digits than its factorization.

128389072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1146346 (or 1146340 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 128389072 is about 11330.8901680318. The cubic root of 128389072 is about 504.4785284632.

The spelling of 128389072 in words is "one hundred twenty-eight million, three hundred eighty-nine thousand, seventy-two".