7272121320 has 48 divisors (see below), whose sum is σ = 23634395460. Its totient is φ = 1939232256.

The previous prime is 7272121291. The next prime is 7272121447. The reversal of 7272121320 is 231212727.

It can be written as a sum of positive squares in 2 ways, for example, as 7077183876 + 194937444 = 84126^2 + 13962^2 .

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10099809 + ... + 10100528.

Almost surely, 2^7272121320 is an apocalyptic number.

It is an amenable number.

7272121320 is an abundant number, since it is smaller than the sum of its proper divisors (16362274140).

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

7272121320 is a wasteful number, since it uses less digits than its factorization.

7272121320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20200354 (or 20200347 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 27.

The square root of 7272121320 is about 85276.7337554623. The cubic root of 7272121320 is about 1937.4048020933.

The spelling of 7272121320 in words is "seven billion, two hundred seventy-two million, one hundred twenty-one thousand, three hundred twenty".