15994 has 8 divisors (see below), whose sum is σ = 26208. Its totient is φ = 7260.
The previous prime is 15991. The next prime is 16001. The reversal of 15994 is 49951.
15994 = 332 + 342 + ... + 432.
It is a sphenic number, since it is the product of 3 distinct primes.
It is not an unprimeable number, because it can be changed into a prime (15991) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 342 + ... + 385.
It is an arithmetic number, because the mean of its divisors is an integer number (3276).
15994 is a deficient number, since it is larger than the sum of its proper divisors (10214).
15994 is a wasteful number, since it uses less digits than its factorization.
15994 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 740.
The product of its digits is 1620, while the sum is 28.
The square root of 15994 is about 126.4673871004. The cubic root of 15994 is about 25.1952708015.
It can be divided in two parts, 159 and 94, that added together give a triangular number (253 = T22).
The spelling of 15994 in words is "fifteen thousand, nine hundred ninety-four".
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