538170381 has 54 divisors (see below), whose sum is σ = 920833290. Its totient is φ = 301988736.

The previous prime is 538170349. The next prime is 538170403. The reversal of 538170381 is 183071835.

It can be written as a sum of positive squares in 3 ways, for example, as 234365481 + 303804900 = 15309^2 + 17430^2 .

It is not a de Polignac number, because 538170381 - 2⁵ = 538170349 is a prime.

It is a super-2 number, since 2×538170381² = 579254717971370322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (538170301) by changing a digit.

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 53 ways as a sum of consecutive naturals, for example, 2349975 + ... + 2350203.

Almost surely, 2^538170381 is an apocalyptic number.

It is an amenable number.

538170381 is a deficient number, since it is larger than the sum of its proper divisors (382662909).

538170381 is a wasteful number, since it uses less digits than its factorization.

538170381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395 (or 312 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 538170381 is about 23198.4995419962. The cubic root of 538170381 is about 813.4045498682.

The spelling of 538170381 in words is "five hundred thirty-eight million, one hundred seventy thousand, three hundred eighty-one".