538398602820 has 288 divisors, whose sum is σ = 1818256632192. Its totient is φ = 128109993984.

The previous prime is 538398602713. The next prime is 538398602837. The reversal of 538398602820 is 28206893835.

538398602820 is a `hidden beast` number, since 5 + 3 + 8 + 3 + 9 + 8 + 602 + 8 + 20 = 666.

It is a super-2 number, since 2×538398602820² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 9732559 + ... + 9787721.

It is an arithmetic number, because the mean of its divisors is an integer number (6313391084).

Almost surely, 2^538398602820 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 538398602820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (909128316096).

538398602820 is an abundant number, since it is smaller than the sum of its proper divisors (1279858029372).

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

538398602820 is a wasteful number, since it uses less digits than its factorization.

538398602820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55331 (or 55326 counting only the distinct ones).

The product of its (nonzero) digits is 4976640, while the sum is 54.

The spelling of 538398602820 in words is "five hundred thirty-eight billion, three hundred ninety-eight million, six hundred two thousand, eight hundred twenty".