138557064 has 32 divisors (see below), whose sum is σ = 346681440. Its totient is φ = 46147200.

The previous prime is 138557039. The next prime is 138557071. The reversal of 138557064 is 460755831.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53479 + ... + 56009.

It is an arithmetic number, because the mean of its divisors is an integer number (10833795).

Almost surely, 2^138557064 is an apocalyptic number.

It is an amenable number.

138557064 is an abundant number, since it is smaller than the sum of its proper divisors (208124376).

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

138557064 is a wasteful number, since it uses less digits than its factorization.

138557064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4821 (or 4817 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 39.

The square root of 138557064 is about 11771.0264633124. The cubic root of 138557064 is about 517.4593326114.

The spelling of 138557064 in words is "one hundred thirty-eight million, five hundred fifty-seven thousand, sixty-four".