138497306 has 8 divisors (see below), whose sum is σ = 216778464. Its totient is φ = 66237820.

The previous prime is 138497299. The next prime is 138497339. The reversal of 138497306 is 603794831.

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, 1505360 + ... + 1505451.

It is an arithmetic number, because the mean of its divisors is an integer number (27097308).

Almost surely, 2^138497306 is an apocalyptic number.

138497306 is a deficient number, since it is larger than the sum of its proper divisors (78281158).

138497306 is a wasteful number, since it uses less digits than its factorization.

138497306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3010836.

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 138497306 is about 11768.4878382909. The cubic root of 138497306 is about 517.3849305794.

The spelling of 138497306 in words is "one hundred thirty-eight million, four hundred ninety-seven thousand, three hundred six".