16081978 has 8 divisors (see below), whose sum is σ = 26316000. Its totient is φ = 7309980.

The previous prime is 16081937. The next prime is 16082021. The reversal of 16081978 is 87918061.

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

It is a self number, because there is not a number n which added to its sum of digits gives 16081978.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 365478 + ... + 365521.

It is an arithmetic number, because the mean of its divisors is an integer number (3289500).

Almost surely, 2^16081978 is an apocalyptic number.

16081978 is a deficient number, since it is larger than the sum of its proper divisors (10234022).

16081978 is a wasteful number, since it uses less digits than its factorization.

16081978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 731012.

The product of its (nonzero) digits is 24192, while the sum is 40.

The square root of 16081978 is about 4010.2341577519. The cubic root of 16081978 is about 252.4138345997.

The spelling of 16081978 in words is "sixteen million, eighty-one thousand, nine hundred seventy-eight".