138550004 has 6 divisors (see below), whose sum is σ = 242462514. Its totient is φ = 69275000.

The previous prime is 138549997. The next prime is 138550007. The reversal of 138550004 is 400055831.

It can be written as a sum of positive squares in only one way, i.e., 109411600 + 29138404 = 10460^2 + 5398^2 .

It is a super-2 number, since 2×138550004² = 38392207216800032, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138550007) 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 as a sum of consecutive naturals, namely, 17318747 + ... + 17318754.

It is an arithmetic number, because the mean of its divisors is an integer number (40410419).

Almost surely, 2^138550004 is an apocalyptic number.

It is an amenable number.

138550004 is a deficient number, since it is larger than the sum of its proper divisors (103912510).

138550004 is a wasteful number, since it uses less digits than its factorization.

138550004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34637505 (or 34637503 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 138550004 is about 11770.7265706073. The cubic root of 138550004 is about 517.4505436335.

The spelling of 138550004 in words is "one hundred thirty-eight million, five hundred fifty thousand, four".