138898224 has 30 divisors (see below), whose sum is σ = 388722516. Its totient is φ = 46299360.

The previous prime is 138898171. The next prime is 138898229. The reversal of 138898224 is 422898831.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 138898224.

It is not an unprimeable number, because it can be changed into a prime (138898229) 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, 482142 + ... + 482429.

Almost surely, 2^138898224 is an apocalyptic number.

It is an amenable number.

138898224 is an abundant number, since it is smaller than the sum of its proper divisors (249824292).

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

138898224 is a wasteful number, since it uses less digits than its factorization.

138898224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 964585 (or 964576 counting only the distinct ones).

The product of its digits is 221184, while the sum is 45.

The square root of 138898224 is about 11785.5090683432. The cubic root of 138898224 is about 517.8836866100.

The spelling of 138898224 in words is "one hundred thirty-eight million, eight hundred ninety-eight thousand, two hundred twenty-four".