2857238738 has 8 divisors (see below), whose sum is σ = 4311522432. Its totient is φ = 1420064596.

The previous prime is 2857238737. The next prime is 2857238749. The reversal of 2857238738 is 8378327582.

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

It is a self number, because there is not a number n which added to its sum of digits gives 2857238738.

It is not an unprimeable number, because it can be changed into a prime (2857238737) 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, 4276970 + ... + 4277637.

It is an arithmetic number, because the mean of its divisors is an integer number (538940304).

Almost surely, 2^2857238738 is an apocalyptic number.

2857238738 is a deficient number, since it is larger than the sum of its proper divisors (1454283694).

2857238738 is a wasteful number, since it uses less digits than its factorization.

2857238738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8554776.

The product of its digits is 4515840, while the sum is 53.

The square root of 2857238738 is about 53453.1452582540. The cubic root of 2857238738 is about 1418.9992846832. Note that the first 3 decimals are identical.

The spelling of 2857238738 in words is "two billion, eight hundred fifty-seven million, two hundred thirty-eight thousand, seven hundred thirty-eight".