128340716 has 48 divisors (see below), whose sum is σ = 267387456. Its totient is φ = 52752384.

The previous prime is 128340683. The next prime is 128340733. The reversal of 128340716 is 617043821.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74780 + ... + 76476.

It is an arithmetic number, because the mean of its divisors is an integer number (5570572).

Almost surely, 2^128340716 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 128340716, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (133693728).

128340716 is an abundant number, since it is smaller than the sum of its proper divisors (139046740).

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

128340716 is a wasteful number, since it uses less digits than its factorization.

128340716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1818 (or 1816 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 128340716 is about 11328.7561541415. The cubic root of 128340716 is about 504.4151855150.

The spelling of 128340716 in words is "one hundred twenty-eight million, three hundred forty thousand, seven hundred sixteen".