138980388 has 24 divisors (see below), whose sum is σ = 325200960. Its totient is φ = 46196320.

The previous prime is 138980381. The next prime is 138980407. The reversal of 138980388 is 883089831.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (138980381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11823 + ... + 20438.

It is an arithmetic number, because the mean of its divisors is an integer number (13550040).

Almost surely, 2^138980388 is an apocalyptic number.

It is an amenable number.

138980388 is an abundant number, since it is smaller than the sum of its proper divisors (186220572).

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

138980388 is a wasteful number, since it uses less digits than its factorization.

138980388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32627 (or 32625 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 48.

The square root of 138980388 is about 11788.9943591470. The cubic root of 138980388 is about 517.9857829662.

The spelling of 138980388 in words is "one hundred thirty-eight million, nine hundred eighty thousand, three hundred eighty-eight".