538617381 has 8 divisors (see below), whose sum is σ = 749380800. Its totient is φ = 343466112.

The previous prime is 538617367. The next prime is 538617397. The reversal of 538617381 is 183716835.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 538617381 - 2⁷ = 538617253 is a prime.

It is a super-2 number, since 2×538617381² = 580217366230598322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (538617311) 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 7 ways as a sum of consecutive naturals, for example, 3902956 + ... + 3903093.

It is an arithmetic number, because the mean of its divisors is an integer number (93672600).

Almost surely, 2^538617381 is an apocalyptic number.

It is an amenable number.

538617381 is a deficient number, since it is larger than the sum of its proper divisors (210763419).

538617381 is a wasteful number, since it uses less digits than its factorization.

538617381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7806075.

The product of its digits is 120960, while the sum is 42.

The square root of 538617381 is about 23208.1317860788. The cubic root of 538617381 is about 813.6296899773.

The spelling of 538617381 in words is "five hundred thirty-eight million, six hundred seventeen thousand, three hundred eighty-one".