8219724 has 12 divisors (see below), whose sum is σ = 19179384. Its totient is φ = 2739904.

The previous prime is 8219719. The next prime is 8219747. The reversal of 8219724 is 4279128.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 342477 + ... + 342500.

It is an arithmetic number, because the mean of its divisors is an integer number (1598282).

Almost surely, 2^8219724 is an apocalyptic number.

It is an amenable number.

8219724 is an abundant number, since it is smaller than the sum of its proper divisors (10959660).

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

8219724 is a wasteful number, since it uses less digits than its factorization.

8219724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 684984 (or 684982 counting only the distinct ones).

The product of its digits is 8064, while the sum is 33.

The square root of 8219724 is about 2867.0061039349. The cubic root of 8219724 is about 201.8145211133.

The spelling of 8219724 in words is "eight million, two hundred nineteen thousand, seven hundred twenty-four".