128407867 has 8 divisors (see below), whose sum is σ = 149158112. Its totient is φ = 108259200.

The previous prime is 128407841. The next prime is 128407883. The reversal of 128407867 is 768704821.

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

It is not a de Polignac number, because 128407867 - 2⁷ = 128407739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128407837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 149934 + ... + 150787.

It is an arithmetic number, because the mean of its divisors is an integer number (18644764).

Almost surely, 2^128407867 is an apocalyptic number.

128407867 is a deficient number, since it is larger than the sum of its proper divisors (20750245).

128407867 is an equidigital number, since it uses as much as digits as its factorization.

128407867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300789.

The product of its (nonzero) digits is 150528, while the sum is 43.

The square root of 128407867 is about 11331.7195076475. The cubic root of 128407867 is about 504.5031442947.

The spelling of 128407867 in words is "one hundred twenty-eight million, four hundred seven thousand, eight hundred sixty-seven".