138428248 has 32 divisors (see below), whose sum is σ = 304653600. Its totient is φ = 57722112.

The previous prime is 138428233. The next prime is 138428249. The reversal of 138428248 is 842824831.

It is a self number, because there is not a number n which added to its sum of digits gives 138428248.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138428249) 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 7 ways as a sum of consecutive naturals, for example, 31333 + ... + 35476.

It is an arithmetic number, because the mean of its divisors is an integer number (9520425).

Almost surely, 2^138428248 is an apocalyptic number.

It is an amenable number.

138428248 is an abundant number, since it is smaller than the sum of its proper divisors (166225352).

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

138428248 is a wasteful number, since it uses less digits than its factorization.

138428248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66859 (or 66855 counting only the distinct ones).

The product of its digits is 98304, while the sum is 40.

The square root of 138428248 is about 11765.5534506457. The cubic root of 138428248 is about 517.2989228686.

The spelling of 138428248 in words is "one hundred thirty-eight million, four hundred twenty-eight thousand, two hundred forty-eight".