7821209048 has 8 divisors (see below), whose sum is σ = 14664766980. Its totient is φ = 3910604520.

The previous prime is 7821209047. The next prime is 7821209089. The reversal of 7821209048 is 8409021287.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×7821209048² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7821208996 and 7821209014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7821209047) 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 as a sum of consecutive naturals, namely, 488825558 + ... + 488825573.

Almost surely, 2^7821209048 is an apocalyptic number.

It is an amenable number.

7821209048 is a deficient number, since it is larger than the sum of its proper divisors (6843557932).

7821209048 is a wasteful number, since it uses less digits than its factorization.

7821209048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 977651137 (or 977651133 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 41.

The square root of 7821209048 is about 88437.5997412865. The cubic root of 7821209048 is about 1984.9883612563.

The spelling of 7821209048 in words is "seven billion, eight hundred twenty-one million, two hundred nine thousand, forty-eight".