538855506 has 48 divisors (see below), whose sum is σ = 1342545984. Its totient is φ = 153008352.

The previous prime is 538855501. The next prime is 538855507. The reversal of 538855506 is 605558835.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (538855501) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7420 + ... + 33656.

It is an arithmetic number, because the mean of its divisors is an integer number (27969708).

Almost surely, 2^538855506 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 538855506, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (671272992).

538855506 is an abundant number, since it is smaller than the sum of its proper divisors (803690478).

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

538855506 is a wasteful number, since it uses less digits than its factorization.

538855506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26415 (or 26412 counting only the distinct ones).

The product of its (nonzero) digits is 720000, while the sum is 45.

The square root of 538855506 is about 23213.2614253146. The cubic root of 538855506 is about 813.7495753429.

The spelling of 538855506 in words is "five hundred thirty-eight million, eight hundred fifty-five thousand, five hundred six".