138227457 has 8 divisors (see below), whose sum is σ = 185038560. Its totient is φ = 91784000.

The previous prime is 138227431. The next prime is 138227461. The reversal of 138227457 is 754722831.

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

It is a cyclic number.

It is not a de Polignac number, because 138227457 - 2¹⁰ = 138226433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138227407) 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, 91032 + ... + 92537.

It is an arithmetic number, because the mean of its divisors is an integer number (23129820).

Almost surely, 2^138227457 is an apocalyptic number.

It is an amenable number.

138227457 is a deficient number, since it is larger than the sum of its proper divisors (46811103).

138227457 is a wasteful number, since it uses less digits than its factorization.

138227457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183823.

The product of its digits is 94080, while the sum is 39.

The square root of 138227457 is about 11757.0173513523. The cubic root of 138227457 is about 517.0486867815.

The spelling of 138227457 in words is "one hundred thirty-eight million, two hundred twenty-seven thousand, four hundred fifty-seven".