138477560 has 64 divisors (see below), whose sum is σ = 337085280. Its totient is φ = 50895360.

The previous prime is 138477551. The next prime is 138477583. The reversal of 138477560 is 65774831.

It is a congruent number.

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, 146690 + ... + 147630.

Almost surely, 2^138477560 is an apocalyptic number.

138477560 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 138477560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (168542640).

138477560 is an abundant number, since it is smaller than the sum of its proper divisors (198607720).

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

138477560 is a wasteful number, since it uses less digits than its factorization.

138477560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1248 (or 1244 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 41.

The square root of 138477560 is about 11767.6488730757. The cubic root of 138477560 is about 517.3603410075.

The spelling of 138477560 in words is "one hundred thirty-eight million, four hundred seventy-seven thousand, five hundred sixty".