16243040 has 72 divisors (see below), whose sum is σ = 42230160. Its totient is φ = 5899520.

The previous prime is 16243033. The next prime is 16243057. The reversal of 16243040 is 4034261.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18941 + ... + 19779.

It is an arithmetic number, because the mean of its divisors is an integer number (586530).

Almost surely, 2^16243040 is an apocalyptic number.

16243040 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 16243040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21115080).

16243040 is an abundant number, since it is smaller than the sum of its proper divisors (25987120).

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

16243040 is a wasteful number, since it uses less digits than its factorization.

16243040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 876 (or 857 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 16243040 is about 4030.2654999392. The cubic root of 16243040 is about 253.2536837938.

It can be divided in two parts, 1624 and 3040, that added together give a palindrome (4664).

The spelling of 16243040 in words is "sixteen million, two hundred forty-three thousand, forty".