7857126338 has 8 divisors (see below), whose sum is σ = 11811256380. Its totient is φ = 3920040880.

The previous prime is 7857126331. The next prime is 7857126401. The reversal of 7857126338 is 8336217587.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 7797419809 + 59706529 = 88303^2 + 7727^2 .

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

It is not an unprimeable number, because it can be changed into a prime (7857126331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4259993 + ... + 4261836.

Almost surely, 2^7857126338 is an apocalyptic number.

7857126338 is a deficient number, since it is larger than the sum of its proper divisors (3954130042).

7857126338 is a wasteful number, since it uses less digits than its factorization.

7857126338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8522292.

The product of its digits is 1693440, while the sum is 50.

The square root of 7857126338 is about 88640.4328622102. The cubic root of 7857126338 is about 1988.0222717122.

The spelling of 7857126338 in words is "seven billion, eight hundred fifty-seven million, one hundred twenty-six thousand, three hundred thirty-eight".