328728867 has 16 divisors (see below), whose sum is σ = 459205632. Its totient is φ = 208913760.

The previous prime is 328728863. The next prime is 328728923. The reversal of 328728867 is 768827823.

It is not a de Polignac number, because 328728867 - 2² = 328728863 is a prime.

It is not an unprimeable number, because it can be changed into a prime (328728863) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20148 + ... + 32609.

It is an arithmetic number, because the mean of its divisors is an integer number (28700352).

Almost surely, 2^328728867 is an apocalyptic number.

328728867 is a deficient number, since it is larger than the sum of its proper divisors (130476765).

328728867 is a wasteful number, since it uses less digits than its factorization.

328728867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52858.

The product of its digits is 1806336, while the sum is 51.

The square root of 328728867 is about 18130.8815836407. The cubic root of 328728867 is about 690.1539018181.

The spelling of 328728867 in words is "three hundred twenty-eight million, seven hundred twenty-eight thousand, eight hundred sixty-seven".