16328978 has 8 divisors (see below), whose sum is σ = 24520320. Its totient is φ = 8155540.

The previous prime is 16328969. The next prime is 16328981. The reversal of 16328978 is 87982361.

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

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1898 + ... + 6021.

It is an arithmetic number, because the mean of its divisors is an integer number (3065040).

Almost surely, 2^16328978 is an apocalyptic number.

16328978 is a deficient number, since it is larger than the sum of its proper divisors (8191342).

16328978 is a wasteful number, since it uses less digits than its factorization.

16328978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8952.

The product of its digits is 145152, while the sum is 44.

The square root of 16328978 is about 4040.9130156439. The cubic root of 16328978 is about 253.6995331055.

The spelling of 16328978 in words is "sixteen million, three hundred twenty-eight thousand, nine hundred seventy-eight".