857347305 has 16 divisors (see below), whose sum is σ = 1375220544. Its totient is φ = 456096960.

The previous prime is 857347303. The next prime is 857347319. The reversal of 857347305 is 503743758.

It is not a de Polignac number, because 857347305 - 2¹ = 857347303 is a prime.

It is not an unprimeable number, because it can be changed into a prime (857347303) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66031 + ... + 77940.

It is an arithmetic number, because the mean of its divisors is an integer number (85951284).

Almost surely, 2^857347305 is an apocalyptic number.

It is an amenable number.

857347305 is a deficient number, since it is larger than the sum of its proper divisors (517873239).

857347305 is a wasteful number, since it uses less digits than its factorization.

857347305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144376.

The product of its (nonzero) digits is 352800, while the sum is 42.

The square root of 857347305 is about 29280.4935921511. The cubic root of 857347305 is about 949.9897708963.

It can be divided in two parts, 85734 and 7305, that added together give a palindrome (93039).

The spelling of 857347305 in words is "eight hundred fifty-seven million, three hundred forty-seven thousand, three hundred five".