16240 has 40 divisors (see below), whose sum is σ = 44640. Its totient is φ = 5376.

The previous prime is 16231. The next prime is 16249. The reversal of 16240 is 4261.

16240 = T₄₁ + T₄₂ + ... + T₅₄.

It is an interprime number because it is at equal distance from previous prime (16231) and next prime (16249).

It is a tau number, because it is divible by the number of its divisors (40).

It is an Ulam number.

16240 is an undulating number in base 12.

It is a plaindrome in base 11.

It is a self number, because there is not a number n which added to its sum of digits gives 16240.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16249) by changing a digit.

16240 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 546 + ... + 574.

It is an arithmetic number, because the mean of its divisors is an integer number (1116).

2¹⁶²⁴⁰ is an apocalyptic number.

16240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22320).

16240 is an abundant number, since it is smaller than the sum of its proper divisors (28400).

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

16240 is a wasteful number, since it uses less digits than its factorization.

16240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49 (or 43 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 16240 is about 127.4362585766. The cubic root of 16240 is about 25.3237883401.

It can be divided in two parts, 162 and 40, that added together give a palindrome (202).

The spelling of 16240 in words is "sixteen thousand, two hundred forty".