538847820 has 144 divisors (see below), whose sum is σ = 1903487040. Its totient is φ = 120826368.

The previous prime is 538847819. The next prime is 538847839. The reversal of 538847820 is 28748835.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 62746 + ... + 70814.

It is an arithmetic number, because the mean of its divisors is an integer number (13218660).

Almost surely, 2^538847820 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 538847820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (951743520).

538847820 is an abundant number, since it is smaller than the sum of its proper divisors (1364639220).

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

538847820 is a wasteful number, since it uses less digits than its factorization.

538847820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8144 (or 8139 counting only the distinct ones).

The product of its (nonzero) digits is 430080, while the sum is 45.

The square root of 538847820 is about 23213.0958728042. The cubic root of 538847820 is about 813.7457063348.

The spelling of 538847820 in words is "five hundred thirty-eight million, eight hundred forty-seven thousand, eight hundred twenty".