138920248 has 32 divisors (see below), whose sum is σ = 276930000. Its totient is φ = 65145600.

The previous prime is 138920219. The next prime is 138920273. The reversal of 138920248 is 842029831.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 10828 + ... + 19876.

Almost surely, 2^138920248 is an apocalyptic number.

It is an amenable number.

138920248 is a deficient number, since it is larger than the sum of its proper divisors (138009752).

138920248 is a wasteful number, since it uses less digits than its factorization.

138920248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9175 (or 9171 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 138920248 is about 11786.4433990920. The cubic root of 138920248 is about 517.9110574124.

The spelling of 138920248 in words is "one hundred thirty-eight million, nine hundred twenty thousand, two hundred forty-eight".