138616456 has 16 divisors (see below), whose sum is σ = 283533840. Its totient is φ = 63007440.

The previous prime is 138616451. The next prime is 138616459. The reversal of 138616456 is 654616831.

It is not an unprimeable number, because it can be changed into a prime (138616451) 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, 787506 + ... + 787681.

It is an arithmetic number, because the mean of its divisors is an integer number (17720865).

Almost surely, 2^138616456 is an apocalyptic number.

It is an amenable number.

138616456 is an abundant number, since it is smaller than the sum of its proper divisors (144917384).

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

138616456 is a wasteful number, since it uses less digits than its factorization.

138616456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1575204 (or 1575200 counting only the distinct ones).

The product of its digits is 103680, while the sum is 40.

The square root of 138616456 is about 11773.5489976472. The cubic root of 138616456 is about 517.5332577598.

The spelling of 138616456 in words is "one hundred thirty-eight million, six hundred sixteen thousand, four hundred fifty-six".