538661384 has 16 divisors (see below), whose sum is σ = 1011232620. Its totient is φ = 268999360.

The previous prime is 538661369. The next prime is 538661393. The reversal of 538661384 is 483166835.

It can be written as a sum of positive squares in 2 ways, for example, as 411197284 + 127464100 = 20278^2 + 11290^2 .

It is a super-2 number, since 2×538661384² = 580312173225590912, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34439 + ... + 47574.

Almost surely, 2^538661384 is an apocalyptic number.

It is an amenable number.

538661384 is a deficient number, since it is larger than the sum of its proper divisors (472571236).

538661384 is a wasteful number, since it uses less digits than its factorization.

538661384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82840 (or 82836 counting only the distinct ones).

The product of its digits is 414720, while the sum is 44.

The square root of 538661384 is about 23209.0797749501. The cubic root of 538661384 is about 813.6518461952.

The spelling of 538661384 in words is "five hundred thirty-eight million, six hundred sixty-one thousand, three hundred eighty-four".