138745210 has 8 divisors (see below), whose sum is σ = 249741396. Its totient is φ = 55498080.

The previous prime is 138745099. The next prime is 138745241. The reversal of 138745210 is 12547831.

138745210 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 131308681 + 7436529 = 11459^2 + 2727^2 .

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

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, 6937251 + ... + 6937270.

Almost surely, 2^138745210 is an apocalyptic number.

138745210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138745210 is a deficient number, since it is larger than the sum of its proper divisors (110996186).

138745210 is a wasteful number, since it uses less digits than its factorization.

138745210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13874528.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 138745210 is about 11779.0156634585. The cubic root of 138745210 is about 517.6934452259.

The spelling of 138745210 in words is "one hundred thirty-eight million, seven hundred forty-five thousand, two hundred ten".