138285057 has 8 divisors (see below), whose sum is σ = 184809600. Its totient is φ = 91975280.

The previous prime is 138285023. The next prime is 138285061. The reversal of 138285057 is 750582831.

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 138285057 - 2¹⁴ = 138268673 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138284057) 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, 52182 + ... + 54767.

It is an arithmetic number, because the mean of its divisors is an integer number (23101200).

Almost surely, 2^138285057 is an apocalyptic number.

It is an amenable number.

138285057 is a deficient number, since it is larger than the sum of its proper divisors (46524543).

138285057 is a wasteful number, since it uses less digits than its factorization.

138285057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107383.

The product of its (nonzero) digits is 67200, while the sum is 39.

The square root of 138285057 is about 11759.4666970913. The cubic root of 138285057 is about 517.1204956420.

The spelling of 138285057 in words is "one hundred thirty-eight million, two hundred eighty-five thousand, fifty-seven".