128038305 has 32 divisors (see below), whose sum is σ = 221975424. Its totient is φ = 62770176.

The previous prime is 128038303. The next prime is 128038307. The reversal of 128038305 is 503830821.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (128038303) and next prime (128038307).

It is not a de Polignac number, because 128038305 - 2¹ = 128038303 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128038303) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5127 + ... + 16803.

It is an arithmetic number, because the mean of its divisors is an integer number (6936732).

Almost surely, 2^128038305 is an apocalyptic number.

128038305 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

128038305 is a deficient number, since it is larger than the sum of its proper divisors (93937119).

128038305 is a wasteful number, since it uses less digits than its factorization.

128038305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11745.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 128038305 is about 11315.4012301818. The cubic root of 128038305 is about 504.0186871063.

The spelling of 128038305 in words is "one hundred twenty-eight million, thirty-eight thousand, three hundred five".