7447272 has 64 divisors (see below), whose sum is σ = 21544320. Its totient is φ = 2101248.

The previous prime is 7447267. The next prime is 7447277. The reversal of 7447272 is 2727447.

It is an interprime number because it is at equal distance from previous prime (7447267) and next prime (7447277).

It is a nude number because it is divisible by every one of its digits.

7447272 is a modest number, since divided by 7272 gives 744 as remainder.

It is not an unprimeable number, because it can be changed into a prime (7447277) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 16068 + ... + 16524.

It is an arithmetic number, because the mean of its divisors is an integer number (336630).

Almost surely, 2^7447272 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 7447272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10772160).

7447272 is an abundant number, since it is smaller than the sum of its proper divisors (14097048).

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

7447272 is a wasteful number, since it uses less digits than its factorization.

7447272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 570 (or 566 counting only the distinct ones).

The product of its digits is 21952, while the sum is 33.

The square root of 7447272 is about 2728.9690361014. The cubic root of 7447272 is about 195.2835847584.

The spelling of 7447272 in words is "seven million, four hundred forty-seven thousand, two hundred seventy-two".