7247007428 has 6 divisors (see below), whose sum is σ = 12682263006. Its totient is φ = 3623503712.

The previous prime is 7247007419. The next prime is 7247007433. The reversal of 7247007428 is 8247007427.

It can be written as a sum of positive squares in only one way, i.e., 5110534144 + 2136473284 = 71488^2 + 46222^2 .

It is a super-2 number, since 2×7247007428² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 905875925 + ... + 905875932.

It is an arithmetic number, because the mean of its divisors is an integer number (2113710501).

Almost surely, 2^7247007428 is an apocalyptic number.

It is an amenable number.

7247007428 is a deficient number, since it is larger than the sum of its proper divisors (5435255578).

7247007428 is a wasteful number, since it uses less digits than its factorization.

7247007428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1811751861 (or 1811751859 counting only the distinct ones).

The product of its (nonzero) digits is 175616, while the sum is 41.

The square root of 7247007428 is about 85129.3570279959. The cubic root of 7247007428 is about 1935.1719876418.

Subtracting 7247007428 from its reverse (8247007427), we obtain a palindrome (999999999).

The spelling of 7247007428 in words is "seven billion, two hundred forty-seven million, seven thousand, four hundred twenty-eight".