8439492820 has 24 divisors (see below), whose sum is σ = 19334111328. Its totient is φ = 3068906400.

The previous prime is 8439492749. The next prime is 8439492821. The reversal of 8439492820 is 282949348.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8439492821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19180446 + ... + 19180885.

It is an arithmetic number, because the mean of its divisors is an integer number (805587972).

Almost surely, 2^8439492820 is an apocalyptic number.

It is an amenable number.

8439492820 is an abundant number, since it is smaller than the sum of its proper divisors (10894618508).

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

8439492820 is a wasteful number, since it uses less digits than its factorization.

8439492820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38361351 (or 38361349 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 49.

The square root of 8439492820 is about 91866.7122520448. The cubic root of 8439492820 is about 2035.9734767395.

The spelling of 8439492820 in words is "eight billion, four hundred thirty-nine million, four hundred ninety-two thousand, eight hundred twenty".