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15704 = 2313151

15704 has 16 divisors (see below), whose sum is σ = 31920. Its totient is φ = 7200.

The previous prime is 15683. The next prime is 15727. The reversal of 15704 is 40751.

It is a happy number.

It is a Smith number, since the sum of its digits (17) coincides with the sum of the digits of its prime factors.

It is a lonely number, since its distance to closest prime (15683) sets a new record.

It is a plaindrome in base 9 and base 15.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 15704.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29 + ... + 179.

It is an arithmetic number, because the mean of its divisors is an integer number (1995).

215704 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15960).

15704 is an abundant number, since it is smaller than the sum of its proper divisors (16216).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15704 is a wasteful number, since it uses less digits than its factorization.

15704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170 (or 166 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 17.

The square root of 15704 is about 125.3156015826. The cubic root of 15704 is about 25.0420625234.

The spelling of 15704 in words is "fifteen thousand, seven hundred four".

Divisors: 1 2 4 8 13 26 52 104 151 302 604 1208 1963 3926 7852 15704