128329015 has 8 divisors (see below), whose sum is σ = 155358288. Its totient is φ = 101754240.

The previous prime is 128328997. The next prime is 128329037. The reversal of 128329015 is 510923821.

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

It is not a de Polignac number, because 128329015 - 2⁷ = 128328887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113001 + ... + 114130.

It is an arithmetic number, because the mean of its divisors is an integer number (19419786).

Almost surely, 2^128329015 is an apocalyptic number.

128329015 is a deficient number, since it is larger than the sum of its proper divisors (27029273).

128329015 is a wasteful number, since it uses less digits than its factorization.

128329015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227249.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 128329015 is about 11328.2397132123. The cubic root of 128329015 is about 504.3998556399.

The spelling of 128329015 in words is "one hundred twenty-eight million, three hundred twenty-nine thousand, fifteen".