8394998820 has 384 divisors, whose sum is σ = 28031173632. Its totient is φ = 1857945600.

The previous prime is 8394998813. The next prime is 8394998839. The reversal of 8394998820 is 288994938.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 34833900 + ... + 34834140.

It is an arithmetic number, because the mean of its divisors is an integer number (72997848).

Almost surely, 2^8394998820 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8394998820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14015586816).

8394998820 is an abundant number, since it is smaller than the sum of its proper divisors (19636174812).

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

8394998820 is a wasteful number, since it uses less digits than its factorization.

8394998820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391 (or 389 counting only the distinct ones).

The product of its (nonzero) digits is 8957952, while the sum is 60.

The square root of 8394998820 is about 91624.2261631715. The cubic root of 8394998820 is about 2032.3892064653.

The spelling of 8394998820 in words is "eight billion, three hundred ninety-four million, nine hundred ninety-eight thousand, eight hundred twenty".