138568248 has 96 divisors (see below), whose sum is σ = 461916000. Its totient is φ = 36543744.

The previous prime is 138568237. The next prime is 138568253. The reversal of 138568248 is 842865831.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4023 + ... + 17126.

It is an arithmetic number, because the mean of its divisors is an integer number (4811625).

Almost surely, 2^138568248 is an apocalyptic number.

138568248 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 138568248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (230958000).

138568248 is an abundant number, since it is smaller than the sum of its proper divisors (323347752).

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

138568248 is a wasteful number, since it uses less digits than its factorization.

138568248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21181 (or 21174 counting only the distinct ones).

The product of its digits is 368640, while the sum is 45.

The square root of 138568248 is about 11771.5015184980. The cubic root of 138568248 is about 517.4732549365.

The spelling of 138568248 in words is "one hundred thirty-eight million, five hundred sixty-eight thousand, two hundred forty-eight".