138548610 has 64 divisors (see below), whose sum is σ = 381404160. Its totient is φ = 35752320.

The previous prime is 138548603. The next prime is 138548611. The reversal of 138548610 is 16845831.

138548610 is a `hidden beast` number, since 1 + 38 + 5 + 4 + 8 + 610 = 666.

It is not an unprimeable number, because it can be changed into a prime (138548611) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 94 + ... + 16646.

It is an arithmetic number, because the mean of its divisors is an integer number (5959440).

Almost surely, 2^138548610 is an apocalyptic number.

138548610 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 138548610, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (190702080).

138548610 is an abundant number, since it is smaller than the sum of its proper divisors (242855550).

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

138548610 is a wasteful number, since it uses less digits than its factorization.

138548610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16600 (or 16594 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 138548610 is about 11770.6673557619. The cubic root of 138548610 is about 517.4488082107.

The spelling of 138548610 in words is "one hundred thirty-eight million, five hundred forty-eight thousand, six hundred ten".