138584250 has 192 divisors, whose sum is σ = 448156800. Its totient is φ = 31600800.

The previous prime is 138584239. The next prime is 138584263. The reversal of 138584250 is 52485831.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 330541 + ... + 330959.

It is an arithmetic number, because the mean of its divisors is an integer number (2334150).

Almost surely, 2^138584250 is an apocalyptic number.

138584250 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 138584250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (224078400).

138584250 is an abundant number, since it is smaller than the sum of its proper divisors (309572550).

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

138584250 is a wasteful number, since it uses less digits than its factorization.

138584250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459 (or 436 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 36.

The square root of 138584250 is about 11772.1811912661. The cubic root of 138584250 is about 517.4931736130.

The spelling of 138584250 in words is "one hundred thirty-eight million, five hundred eighty-four thousand, two hundred fifty".