138477600 has 180 divisors, whose sum is σ = 505237194. Its totient is φ = 36910080.

The previous prime is 138477583. The next prime is 138477607. The reversal of 138477600 is 6774831.

138477600 is a `hidden beast` number, since 1 + 3 + 8 + 47 + 7 + 600 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 64448784 + 74028816 = 8028^2 + 8604^2 .

It is a tau number, because it is divible by the number of its divisors (180).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (138477607) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 63732 + ... + 65868.

Almost surely, 2^138477600 is an apocalyptic number.

138477600 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 138477600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (252618597).

138477600 is an abundant number, since it is smaller than the sum of its proper divisors (366759594).

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

138477600 is a wasteful number, since it uses less digits than its factorization.

138477600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2169 (or 2147 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The square root of 138477600 is about 11767.6505726504. The cubic root of 138477600 is about 517.3603908216.

The spelling of 138477600 in words is "one hundred thirty-eight million, four hundred seventy-seven thousand, six hundred".