8450439820 has 24 divisors (see below), whose sum is σ = 17751299328. Its totient is φ = 3379152000.

The previous prime is 8450439797. The next prime is 8450439869. The reversal of 8450439820 is 289340548.

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, 5520 + ... + 130120.

It is an arithmetic number, because the mean of its divisors is an integer number (739637472).

Almost surely, 2^8450439820 is an apocalyptic number.

It is an amenable number.

8450439820 is an abundant number, since it is smaller than the sum of its proper divisors (9300859508).

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

8450439820 is a wasteful number, since it uses less digits than its factorization.

8450439820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128001 (or 127999 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 43.

The square root of 8450439820 is about 91926.2738285415. The cubic root of 8450439820 is about 2036.8533942276.

The spelling of 8450439820 in words is "eight billion, four hundred fifty million, four hundred thirty-nine thousand, eight hundred twenty".