138349736 has 64 divisors (see below), whose sum is σ = 305664000. Its totient is φ = 58677696.

The previous prime is 138349711. The next prime is 138349741. The reversal of 138349736 is 637943831.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 348290 + ... + 348686.

It is an arithmetic number, because the mean of its divisors is an integer number (4776000).

Almost surely, 2^138349736 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 138349736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (152832000).

138349736 is an abundant number, since it is smaller than the sum of its proper divisors (167314264).

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

138349736 is a wasteful number, since it uses less digits than its factorization.

138349736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 551 (or 533 counting only the distinct ones).

The product of its digits is 326592, while the sum is 44.

The square root of 138349736 is about 11762.2164577940. The cubic root of 138349736 is about 517.2011059986.

The spelling of 138349736 in words is "one hundred thirty-eight million, three hundred forty-nine thousand, seven hundred thirty-six".