858185252 has 12 divisors (see below), whose sum is σ = 1542414300. Its totient is φ = 417495456.

The previous prime is 858185243. The next prime is 858185257. The reversal of 858185252 is 252581858.

858185252 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 826217536 + 31967716 = 28744^2 + 5654^2 .

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (858185257) 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, 2899127 + ... + 2899422.

It is an arithmetic number, because the mean of its divisors is an integer number (128534525).

Almost surely, 2^858185252 is an apocalyptic number.

It is an amenable number.

858185252 is a deficient number, since it is larger than the sum of its proper divisors (684229048).

858185252 is a wasteful number, since it uses less digits than its factorization.

858185252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5798590 (or 5798588 counting only the distinct ones).

The product of its digits is 256000, while the sum is 44.

The square root of 858185252 is about 29294.7990605841. The cubic root of 858185252 is about 950.2991678280.

The spelling of 858185252 in words is "eight hundred fifty-eight million, one hundred eighty-five thousand, two hundred fifty-two".