7126398724 has 9 divisors (see below), whose sum is σ = 12471493237. Its totient is φ = 3563114944.

The previous prime is 7126398689. The next prime is 7126398731. The reversal of 7126398724 is 4278936217.

It is a happy number.

The square root of 7126398724 is 84418.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 5712638724 + 1413760000 = 75582^2 + 37600^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 147732 + ... + 189940.

Almost surely, 2^7126398724 is an apocalyptic number.

7126398724 is the 84418-th square number.

It is an amenable number.

7126398724 is a deficient number, since it is larger than the sum of its proper divisors (5345094513).

7126398724 is an frugal number, since it uses more digits than its factorization.

7126398724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84422 (or 42211 counting only the distinct ones).

The product of its digits is 1016064, while the sum is 49.

The cubic root of 7126398724 is about 1924.3764753153.

Multiplying 7126398724 by its sum of digits (49), we get a square (349193537476 = 590926²).

The spelling of 7126398724 in words is "seven billion, one hundred twenty-six million, three hundred ninety-eight thousand, seven hundred twenty-four".