138448863 has 60 divisors (see below), whose sum is σ = 240325800. Its totient is φ = 76755168.

The previous prime is 138448853. The next prime is 138448873. The reversal of 138448863 is 368844831.

138448863 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (138448853) and next prime (138448873).

It is not a de Polignac number, because 138448863 - 2⁴ = 138448847 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138448823) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 929113 + ... + 929261.

It is an arithmetic number, because the mean of its divisors is an integer number (4005430).

Almost surely, 2^138448863 is an apocalyptic number.

138448863 is a deficient number, since it is larger than the sum of its proper divisors (101876937).

138448863 is an equidigital number, since it uses as much as digits as its factorization.

138448863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226 (or 202 counting only the distinct ones).

The product of its digits is 442368, while the sum is 45.

The square root of 138448863 is about 11766.4294924161. The cubic root of 138448863 is about 517.3246006430.

The spelling of 138448863 in words is "one hundred thirty-eight million, four hundred forty-eight thousand, eight hundred sixty-three".