7272529920 has 360 divisors, whose sum is σ = 26263582884. Its totient is φ = 1925185536.

The previous prime is 7272529907. The next prime is 7272529967. The reversal of 7272529920 is 299252727.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 7267221504 + 5308416 = 85248^2 + 2304^2 .

It is a tau number, because it is divible by the number of its divisors (360).

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

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 53084092 + ... + 53084228.

Almost surely, 2^7272529920 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7272529920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13131791442).

7272529920 is an abundant number, since it is smaller than the sum of its proper divisors (18991052964).

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

7272529920 is an frugal number, since it uses more digits than its factorization.

7272529920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188 (or 147 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 45.

The square root of 7272529920 is about 85279.1294514666. The cubic root of 7272529920 is about 1937.4410871854.

The spelling of 7272529920 in words is "seven billion, two hundred seventy-two million, five hundred twenty-nine thousand, nine hundred twenty".