138027708 has 162 divisors, whose sum is σ = 440438544. Its totient is φ = 36324288.

The previous prime is 138027691. The next prime is 138027713. The reversal of 138027708 is 807720831.

138027708 = 387² + 388² + ... + 778².

138027708 is a `hidden beast` number, since 1 + 380 + 277 + 0 + 8 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 297885 + ... + 298347.

Almost surely, 2^138027708 is an apocalyptic number.

138027708 is a gapful number since it is divisible by the number (18) 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 138027708, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (220219272).

138027708 is an abundant number, since it is smaller than the sum of its proper divisors (302410836).

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

138027708 is a wasteful number, since it uses less digits than its factorization.

138027708 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513 (or 488 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 36.

The square root of 138027708 is about 11748.5193960771. The cubic root of 138027708 is about 516.7995087251.

The spelling of 138027708 in words is "one hundred thirty-eight million, twenty-seven thousand, seven hundred eight".