128038767 has 4 divisors (see below), whose sum is σ = 170718360. Its totient is φ = 85359176.

The previous prime is 128038727. The next prime is 128038783. The reversal of 128038767 is 767830821.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 128038767 - 2¹⁰ = 128037743 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128038717) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21339792 + ... + 21339797.

It is an arithmetic number, because the mean of its divisors is an integer number (42679590).

Almost surely, 2^128038767 is an apocalyptic number.

128038767 is a deficient number, since it is larger than the sum of its proper divisors (42679593).

128038767 is an equidigital number, since it uses as much as digits as its factorization.

128038767 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42679592.

The product of its (nonzero) digits is 112896, while the sum is 42.

The square root of 128038767 is about 11315.4216448173. The cubic root of 128038767 is about 504.0192933217.

The spelling of 128038767 in words is "one hundred twenty-eight million, thirty-eight thousand, seven hundred sixty-seven".