138855652 has 12 divisors (see below), whose sum is σ = 261689596. Its totient is φ = 64087200.

The previous prime is 138855649. The next prime is 138855659. The reversal of 138855652 is 256558831.

It can be written as a sum of positive squares in 2 ways, for example, as 17106496 + 121749156 = 4136^2 + 11034^2 .

It is a junction number, because it is equal to n+sod(n) for n = 138855599 and 138855608.

It is not an unprimeable number, because it can be changed into a prime (138855659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1335099 + ... + 1335202.

Almost surely, 2^138855652 is an apocalyptic number.

It is an amenable number.

138855652 is a deficient number, since it is larger than the sum of its proper divisors (122833944).

138855652 is a wasteful number, since it uses less digits than its factorization.

138855652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2670318 (or 2670316 counting only the distinct ones).

The product of its digits is 288000, while the sum is 43.

The square root of 138855652 is about 11783.7028136321. The cubic root of 138855652 is about 517.8307711334.

The spelling of 138855652 in words is "one hundred thirty-eight million, eight hundred fifty-five thousand, six hundred fifty-two".