138159736 has 48 divisors (see below), whose sum is σ = 306671400. Its totient is φ = 57963840.

The previous prime is 138159673. The next prime is 138159737. The reversal of 138159736 is 637951831.

It is a super-2 number, since 2×138159736² = 38176225303179392, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 138159692 and 138159701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138159737) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7095 + ... + 18073.

Almost surely, 2^138159736 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 138159736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (153335700).

138159736 is an abundant number, since it is smaller than the sum of its proper divisors (168511664).

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

138159736 is a wasteful number, since it uses less digits than its factorization.

138159736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11020 (or 11005 counting only the distinct ones).

The product of its digits is 136080, while the sum is 43.

The square root of 138159736 is about 11754.1369738488. The cubic root of 138159736 is about 516.9642347373.

The spelling of 138159736 in words is "one hundred thirty-eight million, one hundred fifty-nine thousand, seven hundred thirty-six".