138233152 has 14 divisors (see below), whose sum is σ = 274306538. Its totient is φ = 69116544.

The previous prime is 138233143. The next prime is 138233159. The reversal of 138233152 is 251332831.

It can be written as a sum of positive squares in only one way, i.e., 77018176 + 61214976 = 8776^2 + 7824^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 138233152.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138233159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1079883 + ... + 1080010.

Almost surely, 2^138233152 is an apocalyptic number.

It is an amenable number.

138233152 is a deficient number, since it is larger than the sum of its proper divisors (136073386).

138233152 is an equidigital number, since it uses as much as digits as its factorization.

138233152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2159905 (or 2159895 counting only the distinct ones).

The product of its digits is 4320, while the sum is 28.

The square root of 138233152 is about 11757.2595446388. The cubic root of 138233152 is about 517.0557875218.

Adding to 138233152 its reverse (251332831), we get a palindrome (389565983).

The spelling of 138233152 in words is "one hundred thirty-eight million, two hundred thirty-three thousand, one hundred fifty-two".