138331032 has 32 divisors (see below), whose sum is σ = 395232000. Its totient is φ = 39523104.

The previous prime is 138331019. The next prime is 138331033. The reversal of 138331032 is 230133831.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 138330993 and 138331011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138331033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 411532 + ... + 411867.

It is an arithmetic number, because the mean of its divisors is an integer number (12351000).

Almost surely, 2^138331032 is an apocalyptic number.

138331032 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

138331032 is an abundant number, since it is smaller than the sum of its proper divisors (256900968).

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

138331032 is a wasteful number, since it uses less digits than its factorization.

138331032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 823415 (or 823411 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 138331032 is about 11761.4213426779. The cubic root of 138331032 is about 517.1777975203.

Adding to 138331032 its reverse (230133831), we get a palindrome (368464863).

The spelling of 138331032 in words is "one hundred thirty-eight million, three hundred thirty-one thousand, thirty-two".