7224756 has 72 divisors (see below), whose sum is σ = 21411936. Its totient is φ = 1874880.

The previous prime is 7224751. The next prime is 7224761. The reversal of 7224756 is 6574227.

It is an interprime number because it is at equal distance from previous prime (7224751) and next prime (7224761).

It is a super-3 number, since 3×7224756³ (a number of 22 digits) contains 333 as substring.

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

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7224751) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5910 + ... + 7026.

It is an arithmetic number, because the mean of its divisors is an integer number (297388).

Almost surely, 2^7224756 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 7224756, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10705968).

7224756 is an abundant number, since it is smaller than the sum of its proper divisors (14187180).

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

7224756 is a wasteful number, since it uses less digits than its factorization.

7224756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1149 (or 1140 counting only the distinct ones).

The product of its digits is 23520, while the sum is 33.

The square root of 7224756 is about 2687.8906227747. The cubic root of 7224756 is about 193.3189353791.

The spelling of 7224756 in words is "seven million, two hundred twenty-four thousand, seven hundred fifty-six".