128369720 has 32 divisors (see below), whose sum is σ = 305823600. Its totient is φ = 48327168.

The previous prime is 128369713. The next prime is 128369723. The reversal of 128369720 is 27963821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128369723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93710 + ... + 95069.

Almost surely, 2^128369720 is an apocalyptic number.

128369720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128369720 is an abundant number, since it is smaller than the sum of its proper divisors (177453880).

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

128369720 is a wasteful number, since it uses less digits than its factorization.

128369720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188807 (or 188803 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 128369720 is about 11330.0361870561. The cubic root of 128369720 is about 504.4531806178.

The spelling of 128369720 in words is "one hundred twenty-eight million, three hundred sixty-nine thousand, seven hundred twenty".