128308674 has 64 divisors (see below), whose sum is σ = 296319744. Its totient is φ = 36723456.

The previous prime is 128308667. The next prime is 128308679. The reversal of 128308674 is 476803821.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (128308679) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 65412 + ... + 67344.

It is an arithmetic number, because the mean of its divisors is an integer number (4629996).

Almost surely, 2^128308674 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128308674, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (148159872).

128308674 is an abundant number, since it is smaller than the sum of its proper divisors (168011070).

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

128308674 is a wasteful number, since it uses less digits than its factorization.

128308674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2011.

The product of its (nonzero) digits is 64512, while the sum is 39.

The square root of 128308674 is about 11327.3418770690. The cubic root of 128308674 is about 504.3732039908.

The spelling of 128308674 in words is "one hundred twenty-eight million, three hundred eight thousand, six hundred seventy-four".