138958484 has 12 divisors (see below), whose sum is σ = 277917024. Its totient is φ = 59553624.

The previous prime is 138958451. The next prime is 138958487. The reversal of 138958484 is 484859831.

138958484 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138958487) 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, 2481374 + ... + 2481429.

It is an arithmetic number, because the mean of its divisors is an integer number (23159752).

Almost surely, 2^138958484 is an apocalyptic number.

138958484 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

138958484 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.

138958484 is a wasteful number, since it uses less digits than its factorization.

138958484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4962814 (or 4962812 counting only the distinct ones).

The product of its digits is 1105920, while the sum is 50.

The square root of 138958484 is about 11788.0653204841. The cubic root of 138958484 is about 517.9585691584.

The spelling of 138958484 in words is "one hundred thirty-eight million, nine hundred fifty-eight thousand, four hundred eighty-four".