138018048 has 72 divisors (see below), whose sum is σ = 419821248. Its totient is φ = 39432192.

The previous prime is 138018037. The next prime is 138018061. The reversal of 138018048 is 840810831.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7461 + ... + 18212.

Almost surely, 2^138018048 is an apocalyptic number.

It is an amenable number.

138018048 is an abundant number, since it is smaller than the sum of its proper divisors (281803200).

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

138018048 is an equidigital number, since it uses as much as digits as its factorization.

138018048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25699 (or 25685 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 33.

The square root of 138018048 is about 11748.1082732498. The cubic root of 138018048 is about 516.7874522093.

Adding to 138018048 its reverse (840810831), we get a palindrome (978828879).

The spelling of 138018048 in words is "one hundred thirty-eight million, eighteen thousand, forty-eight".