538790644 has 12 divisors (see below), whose sum is σ = 1077581344. Its totient is φ = 230910264.

The previous prime is 538790611. The next prime is 538790647. The reversal of 538790644 is 446097835.

538790644 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 538790594 and 538790603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (538790647) 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 3 ways as a sum of consecutive naturals, for example, 9621234 + ... + 9621289.

Almost surely, 2^538790644 is an apocalyptic number.

It is an amenable number.

538790644 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

538790644 is a wasteful number, since it uses less digits than its factorization.

538790644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19242534 (or 19242532 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 46.

The square root of 538790644 is about 23211.8642939338. The cubic root of 538790644 is about 813.7169237061.

The spelling of 538790644 in words is "five hundred thirty-eight million, seven hundred ninety thousand, six hundred forty-four".