7821970280 has 32 divisors (see below), whose sum is σ = 17604289440. Its totient is φ = 3127924800.

The previous prime is 7821970271. The next prime is 7821970309. The reversal of 7821970280 is 820791287.

It is a super-2 number, since 2×7821970280² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 131255 + ... + 181305.

It is an arithmetic number, because the mean of its divisors is an integer number (550134045).

Almost surely, 2^7821970280 is an apocalyptic number.

It is an amenable number.

7821970280 is an abundant number, since it is smaller than the sum of its proper divisors (9782319160).

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

7821970280 is a wasteful number, since it uses less digits than its factorization.

7821970280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53969 (or 53965 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 44.

The square root of 7821970280 is about 88441.9034168759. The cubic root of 7821970280 is about 1985.0527582752.

The spelling of 7821970280 in words is "seven billion, eight hundred twenty-one million, nine hundred seventy thousand, two hundred eighty".