138682488 has 32 divisors (see below), whose sum is σ = 396236160. Its totient is φ = 39623520.

The previous prime is 138682487. The next prime is 138682507. The reversal of 138682488 is 884286831.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138682483) 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, 412578 + ... + 412913.

It is an arithmetic number, because the mean of its divisors is an integer number (12382380).

Almost surely, 2^138682488 is an apocalyptic number.

It is an amenable number.

138682488 is an abundant number, since it is smaller than the sum of its proper divisors (257553672).

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

138682488 is a wasteful number, since it uses less digits than its factorization.

138682488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 825507 (or 825503 counting only the distinct ones).

The product of its digits is 589824, while the sum is 48.

The square root of 138682488 is about 11776.3529159074. The cubic root of 138682488 is about 517.6154229228.

The spelling of 138682488 in words is "one hundred thirty-eight million, six hundred eighty-two thousand, four hundred eighty-eight".