128849369 has 8 divisors (see below), whose sum is σ = 141179520. Its totient is φ = 116622000.

The previous prime is 128849353. The next prime is 128849377. The reversal of 128849369 is 963948821.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 128849369 - 2⁴ = 128849353 is a prime.

It is a super-2 number, since 2×128849369² = 33204319783396322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128849339) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23057 + ... + 28094.

It is an arithmetic number, because the mean of its divisors is an integer number (17647440).

Almost surely, 2^128849369 is an apocalyptic number.

It is an amenable number.

128849369 is a deficient number, since it is larger than the sum of its proper divisors (12330151).

128849369 is a wasteful number, since it uses less digits than its factorization.

128849369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51391.

The product of its digits is 746496, while the sum is 50.

The square root of 128849369 is about 11351.1835946742. The cubic root of 128849369 is about 505.0806903054.

The spelling of 128849369 in words is "one hundred twenty-eight million, eight hundred forty-nine thousand, three hundred sixty-nine".