138548838 has 16 divisors (see below), whose sum is σ = 283542336. Its totient is φ = 45108840.

The previous prime is 138548821. The next prime is 138548867. The reversal of 138548838 is 838845831.

It is a super-2 number, since 2×138548838² = 38391561022300488, which contains 22 as substring.

It is a congruent number.

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, 268248 + ... + 268763.

It is an arithmetic number, because the mean of its divisors is an integer number (17721396).

Almost surely, 2^138548838 is an apocalyptic number.

138548838 is an abundant number, since it is smaller than the sum of its proper divisors (144993498).

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

138548838 is a wasteful number, since it uses less digits than its factorization.

138548838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 537059.

The product of its digits is 737280, while the sum is 48.

The square root of 138548838 is about 11770.6770408503. The cubic root of 138548838 is about 517.4490920540.

The spelling of 138548838 in words is "one hundred thirty-eight million, five hundred forty-eight thousand, eight hundred thirty-eight".