138464648 has 32 divisors (see below), whose sum is σ = 300783360. Its totient is φ = 58527360.

The previous prime is 138464639. The next prime is 138464659. The reversal of 138464648 is 846464831.

It is a junction number, because it is equal to n+sod(n) for n = 138464599 and 138464608.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12848 + ... + 21023.

It is an arithmetic number, because the mean of its divisors is an integer number (9399480).

Almost surely, 2^138464648 is an apocalyptic number.

It is an amenable number.

138464648 is an abundant number, since it is smaller than the sum of its proper divisors (162318712).

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

138464648 is a wasteful number, since it uses less digits than its factorization.

138464648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33957 (or 33953 counting only the distinct ones).

The product of its digits is 442368, while the sum is 44.

The square root of 138464648 is about 11767.1002375267. The cubic root of 138464648 is about 517.3442605095.

The spelling of 138464648 in words is "one hundred thirty-eight million, four hundred sixty-four thousand, six hundred forty-eight".