138570357 has 8 divisors (see below), whose sum is σ = 184876384. Its totient is φ = 92322288.

The previous prime is 138570353. The next prime is 138570361. The reversal of 138570357 is 753075831.

It is an interprime number because it is at equal distance from previous prime (138570353) and next prime (138570361).

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

It is not a de Polignac number, because 138570357 - 2² = 138570353 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138570353) 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, 8563 + ... + 18720.

It is an arithmetic number, because the mean of its divisors is an integer number (23109548).

Almost surely, 2^138570357 is an apocalyptic number.

It is an amenable number.

138570357 is a deficient number, since it is larger than the sum of its proper divisors (46306027).

138570357 is a wasteful number, since it uses less digits than its factorization.

138570357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28979.

The product of its (nonzero) digits is 88200, while the sum is 39.

The square root of 138570357 is about 11771.5910989127. The cubic root of 138570357 is about 517.4758802266.

The spelling of 138570357 in words is "one hundred thirty-eight million, five hundred seventy thousand, three hundred fifty-seven".