7280221939 has 8 divisors (see below), whose sum is σ = 7535556608. Its totient is φ = 7026167880.

The previous prime is 7280221889. The next prime is 7280221981. The reversal of 7280221939 is 9391220827.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7280221939 - 2⁹ = 7280221427 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7280221895 and 7280221904.

It is not an unprimeable number, because it can be changed into a prime (7280221439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 308577 + ... + 331330.

It is an arithmetic number, because the mean of its divisors is an integer number (941944576).

Almost surely, 2^7280221939 is an apocalyptic number.

7280221939 is a deficient number, since it is larger than the sum of its proper divisors (255334669).

7280221939 is a wasteful number, since it uses less digits than its factorization.

7280221939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 640305.

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 7280221939 is about 85324.2166034942. The cubic root of 7280221939 is about 1938.1239115833.

The spelling of 7280221939 in words is "seven billion, two hundred eighty million, two hundred twenty-one thousand, nine hundred thirty-nine".