138331548 has 36 divisors (see below), whose sum is σ = 360954048. Its totient is φ = 44622720.

The previous prime is 138331547. The next prime is 138331561. The reversal of 138331548 is 845133831.

138331548 is a `hidden beast` number, since 1 + 3 + 83 + 31 + 548 = 666.

138331548 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138331541) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 60861 + ... + 63092.

Almost surely, 2^138331548 is an apocalyptic number.

138331548 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

138331548 is an abundant number, since it is smaller than the sum of its proper divisors (222622500).

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

138331548 is a wasteful number, since it uses less digits than its factorization.

138331548 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123994 (or 123989 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 138331548 is about 11761.4432787817. The cubic root of 138331548 is about 517.1784405754.

The spelling of 138331548 in words is "one hundred thirty-eight million, three hundred thirty-one thousand, five hundred forty-eight".