7998921050 has 24 divisors (see below), whose sum is σ = 14880571392. Its totient is φ = 3199014000.

The previous prime is 7998921043. The next prime is 7998921059. The reversal of 7998921050 is 501298997.

It is a happy number.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (50).

It is a self number, because there is not a number n which added to its sum of digits gives 7998921050.

It is not an unprimeable number, because it can be changed into a prime (7998921059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 399785 + ... + 419315.

It is an arithmetic number, because the mean of its divisors is an integer number (620023808).

Almost surely, 2^7998921050 is an apocalyptic number.

7998921050 is a deficient number, since it is larger than the sum of its proper divisors (6881650342).

7998921050 is a wasteful number, since it uses less digits than its factorization.

7998921050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27734 (or 27729 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 50.

The square root of 7998921050 is about 89436.6873827514. The cubic root of 7998921050 is about 1999.9100834576.

The spelling of 7998921050 in words is "seven billion, nine hundred ninety-eight million, nine hundred twenty-one thousand, fifty".