15813040 has 40 divisors (see below), whose sum is σ = 37028880. Its totient is φ = 6279936.

The previous prime is 15813019. The next prime is 15813053. The reversal of 15813040 is 4031851.

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

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 11931 + ... + 13189.

It is an arithmetic number, because the mean of its divisors is an integer number (925722).

Almost surely, 2^15813040 is an apocalyptic number.

15813040 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 15813040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18514440).

15813040 is an abundant number, since it is smaller than the sum of its proper divisors (21215840).

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

15813040 is a wasteful number, since it uses less digits than its factorization.

15813040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1429 (or 1423 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 15813040 is about 3976.5613285853. The cubic root of 15813040 is about 250.9988836106.

Adding to 15813040 its reverse (4031851), we get a palindrome (19844891).

The spelling of 15813040 in words is "fifteen million, eight hundred thirteen thousand, forty".