138310146 has 32 divisors (see below), whose sum is σ = 331000320. Its totient is φ = 42556752.

The previous prime is 138310129. The next prime is 138310153. The reversal of 138310146 is 641013831.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 97810 + ... + 99213.

It is an arithmetic number, because the mean of its divisors is an integer number (10343760).

Almost surely, 2^138310146 is an apocalyptic number.

138310146 is an abundant number, since it is smaller than the sum of its proper divisors (192690174).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

138310146 is a wasteful number, since it uses less digits than its factorization.

138310146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197047 (or 197041 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 138310146 is about 11760.5334062703. The cubic root of 138310146 is about 517.1517674026.

Adding to 138310146 its reverse (641013831), we get a palindrome (779323977).

The spelling of 138310146 in words is "one hundred thirty-eight million, three hundred ten thousand, one hundred forty-six".