138043488 has 96 divisors (see below), whose sum is σ = 401974272. Its totient is φ = 41126400.

The previous prime is 138043483. The next prime is 138043561. The reversal of 138043488 is 884340831.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×138043488² = 38112009158412288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138043481) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63345 + ... + 65487.

It is an arithmetic number, because the mean of its divisors is an integer number (4187232).

Almost surely, 2^138043488 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 138043488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (200987136).

138043488 is an abundant number, since it is smaller than the sum of its proper divisors (263930784).

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

138043488 is a wasteful number, since it uses less digits than its factorization.

138043488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2228 (or 2220 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 39.

The square root of 138043488 is about 11749.1909508698. The cubic root of 138043488 is about 516.8192023205.

The spelling of 138043488 in words is "one hundred thirty-eight million, forty-three thousand, four hundred eighty-eight".