857356538 has 8 divisors (see below), whose sum is σ = 1297415988. Its totient is φ = 424884544.

The previous prime is 857356537. The next prime is 857356559. The reversal of 857356538 is 835653758.

It can be written as a sum of positive squares in 2 ways, for example, as 701031529 + 156325009 = 26477^2 + 12503^2 .

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 (857356537) 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, 1896581 + ... + 1897032.

Almost surely, 2^857356538 is an apocalyptic number.

857356538 is a deficient number, since it is larger than the sum of its proper divisors (440059450).

857356538 is a wasteful number, since it uses less digits than its factorization.

857356538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3793728.

The product of its digits is 3024000, while the sum is 50.

The square root of 857356538 is about 29280.6512564185. The cubic root of 857356538 is about 949.9931811145.

The spelling of 857356538 in words is "eight hundred fifty-seven million, three hundred fifty-six thousand, five hundred thirty-eight".