138548620 has 48 divisors (see below), whose sum is σ = 336752640. Its totient is φ = 46897344.

The previous prime is 138548611. The next prime is 138548647. The reversal of 138548620 is 26845831.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 138548620.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4797 + ... + 17323.

It is an arithmetic number, because the mean of its divisors is an integer number (7015680).

Almost surely, 2^138548620 is an apocalyptic number.

138548620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 138548620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (168376320).

138548620 is an abundant number, since it is smaller than the sum of its proper divisors (198204020).

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

138548620 is a wasteful number, since it uses less digits than its factorization.

138548620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12622 (or 12620 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 37.

The square root of 138548620 is about 11770.6677805467. The cubic root of 138548620 is about 517.4488206600.

It can be divided in two parts, 1385 and 48620, that added together give a palindrome (50005).

The spelling of 138548620 in words is "one hundred thirty-eight million, five hundred forty-eight thousand, six hundred twenty".