138893056 has 18 divisors (see below), whose sum is σ = 277244072. Its totient is φ = 69446400.

The previous prime is 138893017. The next prime is 138893087. The reversal of 138893056 is 650398831.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271020 + ... + 271531.

Almost surely, 2^138893056 is an apocalyptic number.

138893056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

138893056 is a deficient number, since it is larger than the sum of its proper divisors (138351016).

138893056 is an frugal number, since it uses more digits than its factorization.

138893056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542567 (or 542553 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 43.

The square root of 138893056 is about 11785.2898140012. The cubic root of 138893056 is about 517.8772635471.

The spelling of 138893056 in words is "one hundred thirty-eight million, eight hundred ninety-three thousand, fifty-six".