7216529940 has 72 divisors (see below), whose sum is σ = 22644989640. Its totient is φ = 1858047744.

The previous prime is 7216529923. The next prime is 7216529993. The reversal of 7216529940 is 499256127.

7216529940 is a `hidden beast` number, since 72 + 16 + 529 + 9 + 40 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 2548634256 + 4667895684 = 50484^2 + 68322^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent 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 23 ways as a sum of consecutive naturals, for example, 686019 + ... + 696458.

It is an arithmetic number, because the mean of its divisors is an integer number (314513745).

Almost surely, 2^7216529940 is an apocalyptic number.

It is an amenable number.

7216529940 is an abundant number, since it is smaller than the sum of its proper divisors (15428459700).

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

7216529940 is a wasteful number, since it uses less digits than its factorization.

7216529940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1382521 (or 1382516 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The square root of 7216529940 is about 84950.1615066152. The cubic root of 7216529940 is about 1932.4553695594.

The spelling of 7216529940 in words is "seven billion, two hundred sixteen million, five hundred twenty-nine thousand, nine hundred forty".