538305616 has 40 divisors (see below), whose sum is σ = 1106804160. Its totient is φ = 253076736.

The previous prime is 538305613. The next prime is 538305623. The reversal of 538305616 is 616503835.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (538305613) 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, 9316 + ... + 34108.

It is an arithmetic number, because the mean of its divisors is an integer number (27670104).

Almost surely, 2^538305616 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 538305616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (553402080).

538305616 is an abundant number, since it is smaller than the sum of its proper divisors (568498544).

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

538305616 is a wasteful number, since it uses less digits than its factorization.

538305616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24883 (or 24877 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 37.

The square root of 538305616 is about 23201.4140948348. The cubic root of 538305616 is about 813.4726767140.

The spelling of 538305616 in words is "five hundred thirty-eight million, three hundred five thousand, six hundred sixteen".