138884250 has 64 divisors (see below), whose sum is σ = 348416640. Its totient is φ = 36848000.

The previous prime is 138884183. The next prime is 138884267. The reversal of 138884250 is 52488831.

It is a junction number, because it is equal to n+sod(n) for n = 138884199 and 138884208.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 210421 + ... + 211079.

It is an arithmetic number, because the mean of its divisors is an integer number (5444010).

Almost surely, 2^138884250 is an apocalyptic number.

138884250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 138884250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (174208320).

138884250 is an abundant number, since it is smaller than the sum of its proper divisors (209532390).

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

138884250 is a wasteful number, since it uses less digits than its factorization.

138884250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 960 (or 950 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 39.

The square root of 138884250 is about 11784.9162067450. The cubic root of 138884250 is about 517.8663186189.

The spelling of 138884250 in words is "one hundred thirty-eight million, eight hundred eighty-four thousand, two hundred fifty".