128845398 has 24 divisors (see below), whose sum is σ = 283248504. Its totient is φ = 39043840.

The previous prime is 128845373. The next prime is 128845399. The reversal of 128845398 is 893548821.

It is a super-2 number, since 2×128845398² = 33202273171556808, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128845399) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 88011 + ... + 89462.

It is an arithmetic number, because the mean of its divisors is an integer number (11802021).

Almost surely, 2^128845398 is an apocalyptic number.

128845398 is an abundant number, since it is smaller than the sum of its proper divisors (154403106).

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

128845398 is a wasteful number, since it uses less digits than its factorization.

128845398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177500 (or 177489 counting only the distinct ones).

The product of its digits is 552960, while the sum is 48.

The square root of 128845398 is about 11351.0086776462. The cubic root of 128845398 is about 505.0755015696.

The spelling of 128845398 in words is "one hundred twenty-eight million, eight hundred forty-five thousand, three hundred ninety-eight".