128938349 has 8 divisors (see below), whose sum is σ = 131136000. Its totient is φ = 126754992.

The previous prime is 128938339. The next prime is 128938357. The reversal of 128938349 is 943839821.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128938349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128938339) 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, 15467 + ... + 22295.

It is an arithmetic number, because the mean of its divisors is an integer number (16392000).

Almost surely, 2^128938349 is an apocalyptic number.

It is an amenable number.

128938349 is a deficient number, since it is larger than the sum of its proper divisors (2197651).

128938349 is an equidigital number, since it uses as much as digits as its factorization.

128938349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7147.

The product of its digits is 373248, while the sum is 47.

The square root of 128938349 is about 11355.1023333125. The cubic root of 128938349 is about 505.1969287185.

The spelling of 128938349 in words is "one hundred twenty-eight million, nine hundred thirty-eight thousand, three hundred forty-nine".