7142857138 has 8 divisors (see below), whose sum is σ = 11180124288. Its totient is φ = 3416149044.

The previous prime is 7142857121. The next prime is 7142857147. The reversal of 7142857138 is 8317582417.

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

It is a Harshad number since it is a multiple of its sum of digits (46), and also a Moran number because the ratio is a prime number: 155279503 = 7142857138 / (7 + 1 + 4 + 2 + 8 + 5 + 7 + 1 + 3 + 8).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77639706 + ... + 77639797.

It is an arithmetic number, because the mean of its divisors is an integer number (1397515536).

Almost surely, 2^7142857138 is an apocalyptic number.

7142857138 is a deficient number, since it is larger than the sum of its proper divisors (4037267150).

7142857138 is a wasteful number, since it uses less digits than its factorization.

7142857138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155279528.

The product of its digits is 376320, while the sum is 46.

The square root of 7142857138 is about 84515.4254441164. The cubic root of 7142857138 is about 1925.8567851177.

The spelling of 7142857138 in words is "seven billion, one hundred forty-two million, eight hundred fifty-seven thousand, one hundred thirty-eight".