138511366 has 64 divisors (see below), whose sum is σ = 258007680. Its totient is φ = 54512640.

The previous prime is 138511343. The next prime is 138511367. The reversal of 138511366 is 663115831.

It is a super-2 number, since 2×138511366² = 38370797022371912, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138511367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 882160 + ... + 882316.

It is an arithmetic number, because the mean of its divisors is an integer number (4031370).

Almost surely, 2^138511366 is an apocalyptic number.

138511366 is a deficient number, since it is larger than the sum of its proper divisors (119496314).

138511366 is a wasteful number, since it uses less digits than its factorization.

138511366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289.

The product of its digits is 12960, while the sum is 34.

The square root of 138511366 is about 11769.0851811005. The cubic root of 138511366 is about 517.4024379860.

The spelling of 138511366 in words is "one hundred thirty-eight million, five hundred eleven thousand, three hundred sixty-six".