138861448 has 32 divisors (see below), whose sum is σ = 290648160. Its totient is φ = 61649280.

The previous prime is 138861439. The next prime is 138861461. The reversal of 138861448 is 844168831.

It is a Harshad number since it is a multiple of its sum of digits (43).

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, 14565 + ... + 22132.

It is an arithmetic number, because the mean of its divisors is an integer number (9082755).

Almost surely, 2^138861448 is an apocalyptic number.

It is an amenable number.

138861448 is an abundant number, since it is smaller than the sum of its proper divisors (151786712).

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

138861448 is a wasteful number, since it uses less digits than its factorization.

138861448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36757 (or 36753 counting only the distinct ones).

The product of its digits is 147456, while the sum is 43.

The square root of 138861448 is about 11783.9487439483. The cubic root of 138861448 is about 517.8379759905.

The spelling of 138861448 in words is "one hundred thirty-eight million, eight hundred sixty-one thousand, four hundred forty-eight".