7213446440 has 32 divisors (see below), whose sum is σ = 16412625000. Its totient is φ = 2852957184.

The previous prime is 7213446437. The next prime is 7213446469. The reversal of 7213446440 is 446443127.

It can be written as a sum of positive squares in 4 ways, for example, as 3062736964 + 4150709476 = 55342^2 + 64426^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 7213446440.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1009565 + ... + 1016684.

Almost surely, 2^7213446440 is an apocalyptic number.

It is an amenable number.

7213446440 is an abundant number, since it is smaller than the sum of its proper divisors (9199178560).

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

7213446440 is a wasteful number, since it uses less digits than its factorization.

7213446440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2026349 (or 2026345 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 35.

The square root of 7213446440 is about 84932.0106909050. The cubic root of 7213446440 is about 1932.1800952900.

Adding to 7213446440 its reverse (446443127), we get a palindrome (7659889567).

The spelling of 7213446440 in words is "seven billion, two hundred thirteen million, four hundred forty-six thousand, four hundred forty".