138456456 has 32 divisors (see below), whose sum is σ = 349574400. Its totient is φ = 45694400.

The previous prime is 138456433. The next prime is 138456457. The reversal of 138456456 is 654654831.

It is not an unprimeable number, because it can be changed into a prime (138456457) 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, 26136 + ... + 30983.

It is an arithmetic number, because the mean of its divisors is an integer number (10924200).

Almost surely, 2^138456456 is an apocalyptic number.

It is an amenable number.

138456456 is an abundant number, since it is smaller than the sum of its proper divisors (211117944).

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

138456456 is a wasteful number, since it uses less digits than its factorization.

138456456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57229 (or 57225 counting only the distinct ones).

The product of its digits is 345600, while the sum is 42.

The square root of 138456456 is about 11766.7521432212. The cubic root of 138456456 is about 517.3340577422.

It can be divided in two parts, 13845 and 6456, that added together give a triangular number (20301 = T₂₀₁).

The spelling of 138456456 in words is "one hundred thirty-eight million, four hundred fifty-six thousand, four hundred fifty-six".