15820480 has 56 divisors (see below), whose sum is σ = 40581072. Its totient is φ = 5839872.

The previous prime is 15820439. The next prime is 15820499. The reversal of 15820480 is 8402851.

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, 2259 + ... + 6061.

It is an arithmetic number, because the mean of its divisors is an integer number (724662).

Almost surely, 2^15820480 is an apocalyptic number.

15820480 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 15820480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20290536).

15820480 is an abundant number, since it is smaller than the sum of its proper divisors (24760592).

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

15820480 is a wasteful number, since it uses less digits than its factorization.

15820480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3833 (or 3823 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 28.

The square root of 15820480 is about 3977.4967001872. The cubic root of 15820480 is about 251.0382422433.

The spelling of 15820480 in words is "fifteen million, eight hundred twenty thousand, four hundred eighty".