7280628820 has 48 divisors (see below), whose sum is σ = 15452373888. Its totient is φ = 2881266560.

The previous prime is 7280628779. The next prime is 7280628827. The reversal of 7280628820 is 288260827.

It is a super-2 number, since 2×7280628820² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7280628827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2101890 + ... + 2105350.

It is an arithmetic number, because the mean of its divisors is an integer number (321924456).

Almost surely, 2^7280628820 is an apocalyptic number.

It is an amenable number.

7280628820 is an abundant number, since it is smaller than the sum of its proper divisors (8171745068).

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

7280628820 is a wasteful number, since it uses less digits than its factorization.

7280628820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4560 (or 4558 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 43.

The square root of 7280628820 is about 85326.6008932736. The cubic root of 7280628820 is about 1938.1600172181.

The spelling of 7280628820 in words is "seven billion, two hundred eighty million, six hundred twenty-eight thousand, eight hundred twenty".