15680040 has 64 divisors (see below), whose sum is σ = 48202560. Its totient is φ = 4078080.

The previous prime is 15680033. The next prime is 15680047. The reversal of 15680040 is 4008651.

It is an interprime number because it is at equal distance from previous prime (15680033) and next prime (15680047).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (15680047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3327 + ... + 6513.

It is an arithmetic number, because the mean of its divisors is an integer number (753165).

Almost surely, 2^15680040 is an apocalyptic number.

15680040 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 15680040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24101280).

15680040 is an abundant number, since it is smaller than the sum of its proper divisors (32522520).

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

15680040 is a wasteful number, since it uses less digits than its factorization.

15680040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3242 (or 3238 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 15680040 is about 3959.8030254042. The cubic root of 15680040 is about 250.2932026610.

Adding to 15680040 its reverse (4008651), we get a palindrome (19688691).

The spelling of 15680040 in words is "fifteen million, six hundred eighty thousand, forty".