138358350 has 144 divisors (see below), whose sum is σ = 407442672. Its totient is φ = 33454080.

The previous prime is 138358349. The next prime is 138358351. The reversal of 138358350 is 53853831.

It is an interprime number because it is at equal distance from previous prime (138358349) and next prime (138358351).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138358351) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 391774 + ... + 392126.

It is an arithmetic number, because the mean of its divisors is an integer number (2829463).

Almost surely, 2^138358350 is an apocalyptic number.

138358350 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 138358350, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (203721336).

138358350 is an abundant number, since it is smaller than the sum of its proper divisors (269084322).

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

138358350 is a wasteful number, since it uses less digits than its factorization.

138358350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451 (or 443 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 138358350 is about 11762.5826245770. The cubic root of 138358350 is about 517.2118398533.

The spelling of 138358350 in words is "one hundred thirty-eight million, three hundred fifty-eight thousand, three hundred fifty".