7422720 has 72 divisors (see below), whose sum is σ = 23718576. Its totient is φ = 1978368.

The previous prime is 7422719. The next prime is 7422743. The reversal of 7422720 is 272247.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2874 + ... + 4806.

Almost surely, 2^7422720 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 7422720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11859288).

7422720 is an abundant number, since it is smaller than the sum of its proper divisors (16295856).

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

7422720 is a wasteful number, since it uses less digits than its factorization.

7422720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1957 (or 1943 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 24.

The square root of 7422720 is about 2724.4669203351. The cubic root of 7422720 is about 195.0687463067.

Adding to 7422720 its reverse (272247), we get a palindrome (7694967).

It can be divided in two parts, 74227 and 20, that added together give a palindrome (74247).

The spelling of 7422720 in words is "seven million, four hundred twenty-two thousand, seven hundred twenty".