7323731920 has 80 divisors (see below), whose sum is σ = 18651105360. Its totient is φ = 2662080512.

The previous prime is 7323731917. The next prime is 7323731929. The reversal of 7323731920 is 291373237.

It can be written as a sum of positive squares in 8 ways, for example, as 845413776 + 6478318144 = 29076^2 + 80488^2 .

It is a tau number, because it is divible by the number of its divisors (80).

It is a self number, because there is not a number n which added to its sum of digits gives 7323731920.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7323731929) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53407 + ... + 132286.

It is an arithmetic number, because the mean of its divisors is an integer number (233138817).

Almost surely, 2^7323731920 is an apocalyptic number.

It is an amenable number.

7323731920 is an abundant number, since it is smaller than the sum of its proper divisors (11327373440).

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

7323731920 is a wasteful number, since it uses less digits than its factorization.

7323731920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185752 (or 185746 counting only the distinct ones).

The product of its (nonzero) digits is 47628, while the sum is 37.

The square root of 7323731920 is about 85578.8053200090. The cubic root of 7323731920 is about 1941.9772875273.

The spelling of 7323731920 in words is "seven billion, three hundred twenty-three million, seven hundred thirty-one thousand, nine hundred twenty".