138476456 has 8 divisors (see below), whose sum is σ = 259643370. Its totient is φ = 69238224.

The previous prime is 138476423. The next prime is 138476477. The reversal of 138476456 is 654674831.

It can be written as a sum of positive squares in only one way, i.e., 88548100 + 49928356 = 9410^2 + 7066^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8654771 + ... + 8654786.

Almost surely, 2^138476456 is an apocalyptic number.

It is an amenable number.

138476456 is a deficient number, since it is larger than the sum of its proper divisors (121166914).

138476456 is a wasteful number, since it uses less digits than its factorization.

138476456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17309563 (or 17309559 counting only the distinct ones).

The product of its digits is 483840, while the sum is 44.

The square root of 138476456 is about 11767.6019647165. The cubic root of 138476456 is about 517.3589661341.

The spelling of 138476456 in words is "one hundred thirty-eight million, four hundred seventy-six thousand, four hundred fifty-six".