538146639 has 16 divisors (see below), whose sum is σ = 822973440. Its totient is φ = 347190840.

The previous prime is 538146593. The next prime is 538146641. The reversal of 538146639 is 936641835.

538146639 is a `hidden beast` number, since 5 + 3 + 8 + 1 + 4 + 6 + 639 = 666.

538146639 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 538146639 - 2⁸ = 538146383 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 538146594 and 538146603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (538146659) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 320637 + ... + 322310.

It is an arithmetic number, because the mean of its divisors is an integer number (51435840).

Almost surely, 2^538146639 is an apocalyptic number.

538146639 is a deficient number, since it is larger than the sum of its proper divisors (284826801).

538146639 is a wasteful number, since it uses less digits than its factorization.

538146639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642987 (or 642981 counting only the distinct ones).

The product of its digits is 466560, while the sum is 45.

The square root of 538146639 is about 23197.9878222229. The cubic root of 538146639 is about 813.3925882693.

The spelling of 538146639 in words is "five hundred thirty-eight million, one hundred forty-six thousand, six hundred thirty-nine".