138539270 has 8 divisors (see below), whose sum is σ = 249370704. Its totient is φ = 55415704.

The previous prime is 138539267. The next prime is 138539299. The reversal of 138539270 is 72935831.

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

It is a congruent number.

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, 6926954 + ... + 6926973.

It is an arithmetic number, because the mean of its divisors is an integer number (31171338).

Almost surely, 2^138539270 is an apocalyptic number.

138539270 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138539270 is a deficient number, since it is larger than the sum of its proper divisors (110831434).

138539270 is a wasteful number, since it uses less digits than its factorization.

138539270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13853934.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 138539270 is about 11770.2706001179. The cubic root of 138539270 is about 517.4371803292.

The spelling of 138539270 in words is "one hundred thirty-eight million, five hundred thirty-nine thousand, two hundred seventy".