7218642732 has 24 divisors (see below), whose sum is σ = 19249714176. Its totient is φ = 2062469328.

The previous prime is 7218642719. The next prime is 7218642763. The reversal of 7218642732 is 2372468127.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

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 in 7 ways as a sum of consecutive naturals, for example, 42968028 + ... + 42968195.

It is an arithmetic number, because the mean of its divisors is an integer number (802071424).

Almost surely, 2^7218642732 is an apocalyptic number.

It is an amenable number.

7218642732 is an abundant number, since it is smaller than the sum of its proper divisors (12031071444).

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

7218642732 is a wasteful number, since it uses less digits than its factorization.

7218642732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85936237 (or 85936235 counting only the distinct ones).

The product of its digits is 225792, while the sum is 42.

The square root of 7218642732 is about 84962.5960761558. The cubic root of 7218642732 is about 1932.6439402388.

The spelling of 7218642732 in words is "seven billion, two hundred eighteen million, six hundred forty-two thousand, seven hundred thirty-two".