138750266 has 8 divisors (see below), whose sum is σ = 208782900. Its totient is φ = 69155968.

The previous prime is 138750263. The next prime is 138750281. The reversal of 138750266 is 662057831.

It can be written as a sum of positive squares in 2 ways, for example, as 137475625 + 1274641 = 11725^2 + 1129^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (138750263) 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 in 3 ways as a sum of consecutive naturals, for example, 108791 + ... + 110058.

Almost surely, 2^138750266 is an apocalyptic number.

138750266 is a deficient number, since it is larger than the sum of its proper divisors (70032634).

138750266 is a wasteful number, since it uses less digits than its factorization.

138750266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219168.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 138750266 is about 11779.2302804555. The cubic root of 138750266 is about 517.6997335541.

It can be divided in two parts, 13875026 and 6, that multiplied together give a triangular number (83250156 = T₁₂₉₀₃).

The spelling of 138750266 in words is "one hundred thirty-eight million, seven hundred fifty thousand, two hundred sixty-six".