8240285643 has 4 divisors (see below), whose sum is σ = 10987047528. Its totient is φ = 5493523760.

The previous prime is 8240285633. The next prime is 8240285663. The reversal of 8240285643 is 3465820428.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 8240285643 - 2³⁰ = 7166543819 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8240285595 and 8240285604.

It is not an unprimeable number, because it can be changed into a prime (8240285623) 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 3 ways as a sum of consecutive naturals, for example, 1373380938 + ... + 1373380943.

It is an arithmetic number, because the mean of its divisors is an integer number (2746761882).

Almost surely, 2^8240285643 is an apocalyptic number.

8240285643 is a deficient number, since it is larger than the sum of its proper divisors (2746761885).

8240285643 is a wasteful number, since it uses less digits than its factorization.

8240285643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2746761884.

The product of its (nonzero) digits is 368640, while the sum is 42.

The square root of 8240285643 is about 90776.0190964552. The cubic root of 8240285643 is about 2019.8266069348.

The spelling of 8240285643 in words is "eight billion, two hundred forty million, two hundred eighty-five thousand, six hundred forty-three".