138744246 has 24 divisors (see below), whose sum is σ = 284635512. Its totient is φ = 45060000.

The previous prime is 138744233. The next prime is 138744269. The reversal of 138744246 is 642447831.

It is a congruent 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 11 ways as a sum of consecutive naturals, for example, 184371 + ... + 185121.

It is an arithmetic number, because the mean of its divisors is an integer number (11859813).

Almost surely, 2^138744246 is an apocalyptic number.

138744246 is an abundant number, since it is smaller than the sum of its proper divisors (145891266).

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

138744246 is an frugal number, since it uses more digits than its factorization.

138744246 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1548 (or 797 counting only the distinct ones).

The product of its digits is 129024, while the sum is 39.

The square root of 138744246 is about 11778.9747431599. The cubic root of 138744246 is about 517.6922462472.

The spelling of 138744246 in words is "one hundred thirty-eight million, seven hundred forty-four thousand, two hundred forty-six".