138358056 has 32 divisors (see below), whose sum is σ = 347356800. Its totient is φ = 45924480.

The previous prime is 138358049. The next prime is 138358061. The reversal of 138358056 is 650853831.

It is a super-3 number, since 3×138358056³ (a number of 25 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6325 + ... + 17796.

It is an arithmetic number, because the mean of its divisors is an integer number (10854900).

Almost surely, 2^138358056 is an apocalyptic number.

It is an amenable number.

138358056 is an abundant number, since it is smaller than the sum of its proper divisors (208998744).

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

138358056 is a wasteful number, since it uses less digits than its factorization.

138358056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24369 (or 24365 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 39.

The square root of 138358056 is about 11762.5701273149. The cubic root of 138358056 is about 517.2114735090.

The spelling of 138358056 in words is "one hundred thirty-eight million, three hundred fifty-eight thousand, fifty-six".