138530248 has 16 divisors (see below), whose sum is σ = 261198000. Its totient is φ = 68877456.

The previous prime is 138530233. The next prime is 138530251. The reversal of 138530248 is 842035831.

It is a happy number.

It is a super-2 number, since 2×138530248² = 38381259221883008, which contains 22 as substring.

It is an unprimeable number.

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, 46938 + ... + 49801.

It is an arithmetic number, because the mean of its divisors is an integer number (16324875).

Almost surely, 2^138530248 is an apocalyptic number.

It is an amenable number.

138530248 is a deficient number, since it is larger than the sum of its proper divisors (122667752).

138530248 is a wasteful number, since it uses less digits than its factorization.

138530248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96924 (or 96920 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 138530248 is about 11769.8873401575. The cubic root of 138530248 is about 517.4259478472.

The spelling of 138530248 in words is "one hundred thirty-eight million, five hundred thirty thousand, two hundred forty-eight".