7864224 has 24 divisors (see below), whose sum is σ = 20643840. Its totient is φ = 2621376.

The previous prime is 7864201. The next prime is 7864243. The reversal of 7864224 is 4224687.

It is a tau number, because it is divible by the number of its divisors (24).

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40864 + ... + 41055.

It is an arithmetic number, because the mean of its divisors is an integer number (860160).

Almost surely, 2^7864224 is an apocalyptic number.

It is an amenable number.

7864224 is an abundant number, since it is smaller than the sum of its proper divisors (12779616).

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

7864224 is a wasteful number, since it uses less digits than its factorization.

7864224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81932 (or 81924 counting only the distinct ones).

The product of its digits is 21504, while the sum is 33.

The square root of 7864224 is about 2804.3223780443. The cubic root of 7864224 is about 198.8620712026.

The spelling of 7864224 in words is "seven million, eight hundred sixty-four thousand, two hundred twenty-four".