858472357 has 4 divisors (see below), whose sum is σ = 858904236. Its totient is φ = 858040480.

The previous prime is 858472319. The next prime is 858472379. The reversal of 858472357 is 753274858.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 83740801 + 774731556 = 9151^2 + 27834^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-858472357 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 858472357.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (858472457) 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, 212944 + ... + 216937.

It is an arithmetic number, because the mean of its divisors is an integer number (214726059).

Almost surely, 2^858472357 is an apocalyptic number.

It is an amenable number.

858472357 is a deficient number, since it is larger than the sum of its proper divisors (431879).

858472357 is a wasteful number, since it uses less digits than its factorization.

858472357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431878.

The product of its digits is 1881600, while the sum is 49.

The square root of 858472357 is about 29299.6989233678. The cubic root of 858472357 is about 950.4051298845.

The spelling of 858472357 in words is "eight hundred fifty-eight million, four hundred seventy-two thousand, three hundred fifty-seven".