7226720 has 72 divisors (see below), whose sum is σ = 18016992. Its totient is φ = 2737920.

The previous prime is 7226699. The next prime is 7226741. The reversal of 7226720 is 276227.

It is an interprime number because it is at equal distance from previous prime (7226699) and next prime (7226741).

It is a self number, because there is not a number n which added to its sum of digits gives 7226720.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 153737 + ... + 153783.

It is an arithmetic number, because the mean of its divisors is an integer number (250236).

Almost surely, 2^7226720 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 7226720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9008496).

7226720 is an abundant number, since it is smaller than the sum of its proper divisors (10790272).

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

7226720 is a wasteful number, since it uses less digits than its factorization.

7226720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124 (or 85 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 26.

The square root of 7226720 is about 2688.2559401962. The cubic root of 7226720 is about 193.3364512643.

The spelling of 7226720 in words is "seven million, two hundred twenty-six thousand, seven hundred twenty".