138417224 has 24 divisors (see below), whose sum is σ = 285273030. Its totient is φ = 62916480.

The previous prime is 138417221. The next prime is 138417241. The reversal of 138417224 is 422714831.

It can be written as a sum of positive squares in only one way, i.e., 100200100 + 38217124 = 10010^2 + 6182^2 .

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (138417221) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 70529 + ... + 72464.

Almost surely, 2^138417224 is an apocalyptic number.

It is an amenable number.

138417224 is an abundant number, since it is smaller than the sum of its proper divisors (146855806).

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

138417224 is a wasteful number, since it uses less digits than its factorization.

138417224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143021 (or 143006 counting only the distinct ones).

The product of its digits is 10752, while the sum is 32.

The square root of 138417224 is about 11765.0849550694. The cubic root of 138417224 is about 517.2851904722.

The spelling of 138417224 in words is "one hundred thirty-eight million, four hundred seventeen thousand, two hundred twenty-four".