138590454 has 8 divisors (see below), whose sum is σ = 277180920. Its totient is φ = 46196816.

The previous prime is 138590447. The next prime is 138590471. The reversal of 138590454 is 454095831.

It is a sphenic number, since it is the product of 3 distinct primes.

138590454 is an admirable number.

It is a super-2 number, since 2×138590454² = 38414627879852232, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11549199 + ... + 11549210.

It is an arithmetic number, because the mean of its divisors is an integer number (34647615).

Almost surely, 2^138590454 is an apocalyptic number.

138590454 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.

138590454 is a wasteful number, since it uses less digits than its factorization.

138590454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23098414.

The product of its (nonzero) digits is 86400, while the sum is 39.

The square root of 138590454 is about 11772.4446908873. Note that the first 3 decimals coincide. The cubic root of 138590454 is about 517.5008957020.

The spelling of 138590454 in words is "one hundred thirty-eight million, five hundred ninety thousand, four hundred fifty-four".