538788681 has 24 divisors (see below), whose sum is σ = 822848000. Its totient is φ = 338776992.

The previous prime is 538788647. The next prime is 538788689. The reversal of 538788681 is 186887835.

It is a happy number.

It is not a de Polignac number, because 538788681 - 2¹⁹ = 538264393 is a prime.

It is a super-2 number, since 2×538788681² = 580586485547439522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (538788689) 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 23 ways as a sum of consecutive naturals, for example, 32280 + ... + 46038.

Almost surely, 2^538788681 is an apocalyptic number.

It is an amenable number.

538788681 is a deficient number, since it is larger than the sum of its proper divisors (284059319).

538788681 is a wasteful number, since it uses less digits than its factorization.

538788681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14013 (or 14010 counting only the distinct ones).

The product of its digits is 2580480, while the sum is 54.

The square root of 538788681 is about 23211.8220094847. The cubic root of 538788681 is about 813.7159354878.

The spelling of 538788681 in words is "five hundred thirty-eight million, seven hundred eighty-eight thousand, six hundred eighty-one".