128992710 has 128 divisors (see below), whose sum is σ = 406425600. Its totient is φ = 25384320.

The previous prime is 128992709. The next prime is 128992711. The reversal of 128992710 is 17299821.

It is an interprime number because it is at equal distance from previous prime (128992709) and next prime (128992711).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128992711) 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 63 ways as a sum of consecutive naturals, for example, 42421 + ... + 45359.

It is an arithmetic number, because the mean of its divisors is an integer number (3175200).

Almost surely, 2^128992710 is an apocalyptic number.

128992710 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 128992710, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (203212800).

128992710 is an abundant number, since it is smaller than the sum of its proper divisors (277432890).

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

128992710 is a wasteful number, since it uses less digits than its factorization.

128992710 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2986.

The product of its (nonzero) digits is 18144, while the sum is 39.

The square root of 128992710 is about 11357.4957627111. The cubic root of 128992710 is about 505.2679165248.

The spelling of 128992710 in words is "one hundred twenty-eight million, nine hundred ninety-two thousand, seven hundred ten".