138520760 has 64 divisors (see below), whose sum is σ = 377161920. Its totient is φ = 44697600.

The previous prime is 138520751. The next prime is 138520763. The reversal of 138520760 is 67025831.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138520763) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9791 + ... + 19310.

It is an arithmetic number, because the mean of its divisors is an integer number (5893155).

Almost surely, 2^138520760 is an apocalyptic number.

138520760 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138520760 is an abundant number, since it is smaller than the sum of its proper divisors (238641160).

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

138520760 is a wasteful number, since it uses less digits than its factorization.

138520760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29136 (or 29132 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 138520760 is about 11769.4842707741. The cubic root of 138520760 is about 517.4141346642.

The spelling of 138520760 in words is "one hundred thirty-eight million, five hundred twenty thousand, seven hundred sixty".