8247320638 has 16 divisors (see below), whose sum is σ = 12472170480. Its totient is φ = 4089988800.

The previous prime is 8247320623. The next prime is 8247320651. The reversal of 8247320638 is 8360237428.

It is a junction number, because it is equal to n+sod(n) for n = 8247320594 and 8247320603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 280978 + ... + 308938.

It is an arithmetic number, because the mean of its divisors is an integer number (779510655).

Almost surely, 2^8247320638 is an apocalyptic number.

8247320638 is a deficient number, since it is larger than the sum of its proper divisors (4224849842).

8247320638 is a wasteful number, since it uses less digits than its factorization.

8247320638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29163.

The product of its (nonzero) digits is 387072, while the sum is 43.

The square root of 8247320638 is about 90814.7600228069. The cubic root of 8247320638 is about 2020.4012402635.

The spelling of 8247320638 in words is "eight billion, two hundred forty-seven million, three hundred twenty thousand, six hundred thirty-eight".