15740 has 12 divisors (see below), whose sum is σ = 33096.
Its totient is φ = 6288.
The previous prime is 15739. The next prime is 15749. The reversal of 15740 is 4751.
It is a happy number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (15749) 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, 374 + ... + 413.
It is an arithmetic number, because the mean of its divisors is an integer number (2758).
215740 is an apocalyptic number.
15740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
It is an amenable number.
15740 is an abundant number, since it is smaller than the sum of its proper divisors (17356).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16548).
15740 is a wasteful number, since it uses less digits than its factorization.
15740 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 796 (or 794 counting only the distinct ones).
The product of its (nonzero) digits is 140, while the sum is 17.
The square root of 15740 is about 125.4591567005.
The cubic root of 15740 is about 25.0611834745.
The spelling of 15740 in words is "fifteen thousand, seven hundred forty".