7223904 has 72 divisors (see below), whose sum is σ = 21326760. Its totient is φ = 2405376.

The previous prime is 7223897. The next prime is 7223911. The reversal of 7223904 is 4093227.

It is an interprime number because it is at equal distance from previous prime (7223897) and next prime (7223911).

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 7312 + ... + 8240.

It is an arithmetic number, because the mean of its divisors is an integer number (296205).

Almost surely, 2^7223904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7223904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10663380).

7223904 is an abundant number, since it is smaller than the sum of its proper divisors (14102856).

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

7223904 is an equidigital number, since it uses as much as digits as its factorization.

7223904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 954 (or 934 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 7223904 is about 2687.7321295099. The cubic root of 7223904 is about 193.3113358510.

The spelling of 7223904 in words is "seven million, two hundred twenty-three thousand, nine hundred four".