128858346 has 48 divisors (see below), whose sum is σ = 288741024. Its totient is φ = 41500512.

The previous prime is 128858321. The next prime is 128858347. The reversal of 128858346 is 643858821.

128858346 is a `hidden beast` number, since 1 + 28 + 8 + 583 + 46 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (128858347) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 107965 + ... + 109151.

It is an arithmetic number, because the mean of its divisors is an integer number (6015438).

Almost surely, 2^128858346 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128858346, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (144370512).

128858346 is an abundant number, since it is smaller than the sum of its proper divisors (159882678).

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

128858346 is a wasteful number, since it uses less digits than its factorization.

128858346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1395 (or 1392 counting only the distinct ones).

The product of its digits is 368640, while the sum is 45.

The square root of 128858346 is about 11351.5790091071. The cubic root of 128858346 is about 505.0924197745.

The spelling of 128858346 in words is "one hundred twenty-eight million, eight hundred fifty-eight thousand, three hundred forty-six".