138910578 has 8 divisors (see below), whose sum is σ = 277821168. Its totient is φ = 46303524.

The previous prime is 138910573. The next prime is 138910579. The reversal of 138910578 is 875019831.

138910578 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

138910578 is an admirable number.

It is a super-2 number, since 2×138910578² = 38592297360588168, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (138910573) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11575876 + ... + 11575887.

It is an arithmetic number, because the mean of its divisors is an integer number (34727646).

Almost surely, 2^138910578 is an apocalyptic number.

138910578 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

138910578 is a wasteful number, since it uses less digits than its factorization.

138910578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23151768.

The product of its (nonzero) digits is 60480, while the sum is 42.

The square root of 138910578 is about 11786.0331749066. The cubic root of 138910578 is about 517.8990401670.

The spelling of 138910578 in words is "one hundred thirty-eight million, nine hundred ten thousand, five hundred seventy-eight".