138316248 has 80 divisors (see below), whose sum is σ = 442772880. Its totient is φ = 39517632.

The previous prime is 138316223. The next prime is 138316271. The reversal of 138316248 is 842613831.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 10711 + ... + 19782.

It is an arithmetic number, because the mean of its divisors is an integer number (5534661).

Almost surely, 2^138316248 is an apocalyptic number.

138316248 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

138316248 is an abundant number, since it is smaller than the sum of its proper divisors (304456632).

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

138316248 is a wasteful number, since it uses less digits than its factorization.

138316248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30518 (or 30505 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 138316248 is about 11760.7928304175. The cubic root of 138316248 is about 517.1593725657.

The spelling of 138316248 in words is "one hundred thirty-eight million, three hundred sixteen thousand, two hundred forty-eight".