538145244 has 216 divisors, whose sum is σ = 1761422208. Its totient is φ = 137168640.

The previous prime is 538145243. The next prime is 538145261. The reversal of 538145244 is 442541835.

It is a happy number.

538145244 is a `hidden beast` number, since 53 + 81 + 4 + 524 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 538145199 and 538145208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (538145243) by changing a digit.

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 71 ways as a sum of consecutive naturals, for example, 710514 + ... + 711270.

Almost surely, 2^538145244 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 538145244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (880711104).

538145244 is an abundant number, since it is smaller than the sum of its proper divisors (1223276964).

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

538145244 is a wasteful number, since it uses less digits than its factorization.

538145244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 825 (or 813 counting only the distinct ones).

The product of its digits is 76800, while the sum is 36.

The square root of 538145244 is about 23197.9577549404. The cubic root of 538145244 is about 813.3918854350.

It can be divided in two parts, 5381 and 45244, that added together give a 4-th power (50625 = 15⁴).

The spelling of 538145244 in words is "five hundred thirty-eight million, one hundred forty-five thousand, two hundred forty-four".