138011600 has 60 divisors (see below), whose sum is σ = 335085324. Its totient is φ = 54620160.

The previous prime is 138011567. The next prime is 138011603. The reversal of 138011600 is 6110831.

It can be written as a sum of positive squares in 6 ways, for example, as 19114384 + 118897216 = 4372^2 + 10904^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138011603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37022 + ... + 40578.

Almost surely, 2^138011600 is an apocalyptic number.

138011600 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 138011600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (167542662).

138011600 is an abundant number, since it is smaller than the sum of its proper divisors (197073724).

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

138011600 is a wasteful number, since it uses less digits than its factorization.

138011600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3672 (or 3661 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 138011600 is about 11747.8338428835. The cubic root of 138011600 is about 516.7794042344.

The spelling of 138011600 in words is "one hundred thirty-eight million, eleven thousand, six hundred".