128849634 has 48 divisors (see below), whose sum is σ = 298456704. Its totient is φ = 40075200.

The previous prime is 128849627. The next prime is 128849641. The reversal of 128849634 is 436948821.

It is a happy number.

128849634 is a `hidden beast` number, since 1 + 2 + 8 + 8 + 4 + 9 + 634 = 666.

It is an interprime number because it is at equal distance from previous prime (128849627) and next prime (128849641).

It is a self number, because there is not a number n which added to its sum of digits gives 128849634.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13179 + ... + 20769.

It is an arithmetic number, because the mean of its divisors is an integer number (6217848).

Almost surely, 2^128849634 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128849634, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (149228352).

128849634 is an abundant number, since it is smaller than the sum of its proper divisors (169607070).

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

128849634 is a wasteful number, since it uses less digits than its factorization.

128849634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7663 (or 7660 counting only the distinct ones).

The product of its digits is 331776, while the sum is 45.

The square root of 128849634 is about 11351.1952674597. The cubic root of 128849634 is about 505.0810365658.

The spelling of 128849634 in words is "one hundred twenty-eight million, eight hundred forty-nine thousand, six hundred thirty-four".