138212454 has 8 divisors (see below), whose sum is σ = 276424920. Its totient is φ = 46070816.

The previous prime is 138212423. The next prime is 138212471. The reversal of 138212454 is 454212831.

138212454 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

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

138212454 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11517699 + ... + 11517710.

It is an arithmetic number, because the mean of its divisors is an integer number (34553115).

Almost surely, 2^138212454 is an apocalyptic number.

138212454 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.

138212454 is a wasteful number, since it uses less digits than its factorization.

138212454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23035414.

The product of its digits is 7680, while the sum is 30.

The square root of 138212454 is about 11756.3792895602. The cubic root of 138212454 is about 517.0299795427.

The spelling of 138212454 in words is "one hundred thirty-eight million, two hundred twelve thousand, four hundred fifty-four".