7224761820 has 48 divisors (see below), whose sum is σ = 20506459680. Its totient is φ = 1900210176.

The previous prime is 7224761801. The next prime is 7224761861. The reversal of 7224761820 is 281674227.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 820365 + ... + 829124.

It is an arithmetic number, because the mean of its divisors is an integer number (427217910).

Almost surely, 2^7224761820 is an apocalyptic number.

It is an amenable number.

7224761820 is an abundant number, since it is smaller than the sum of its proper divisors (13281697860).

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

7224761820 is a wasteful number, since it uses less digits than its factorization.

7224761820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1649574 (or 1649572 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 39.

The square root of 7224761820 is about 84998.5989296294. The cubic root of 7224761820 is about 1933.1898728931.

The spelling of 7224761820 in words is "seven billion, two hundred twenty-four million, seven hundred sixty-one thousand, eight hundred twenty".