138845472 has 48 divisors (see below), whose sum is σ = 365837472. Its totient is φ = 46108160.

The previous prime is 138845461. The next prime is 138845561. The reversal of 138845472 is 274548831.

It is a tau number, because it is divible by the number of its divisors (48).

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, 24403 + ... + 29549.

It is an arithmetic number, because the mean of its divisors is an integer number (7621614).

Almost surely, 2^138845472 is an apocalyptic number.

138845472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

138845472 is an abundant number, since it is smaller than the sum of its proper divisors (226992000).

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

138845472 is a wasteful number, since it uses less digits than its factorization.

138845472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5441 (or 5433 counting only the distinct ones).

The product of its digits is 215040, while the sum is 42.

The square root of 138845472 is about 11783.2708532054. The cubic root of 138845472 is about 517.8181161544.

The spelling of 138845472 in words is "one hundred thirty-eight million, eight hundred forty-five thousand, four hundred seventy-two".