853868690 has 64 divisors (see below), whose sum is σ = 1676886624. Its totient is φ = 311820288.

The previous prime is 853868689. The next prime is 853868711. The reversal of 853868690 is 96868358.

It is a happy number.

It can be written as a sum of positive squares in 16 ways, for example, as 458773561 + 395095129 = 21419^2 + 19877^2 .

It is a super-2 number, since 2×853868690² = 1458183479524632200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 873482 + ... + 874458.

Almost surely, 2^853868690 is an apocalyptic number.

853868690 is a deficient number, since it is larger than the sum of its proper divisors (823017934).

853868690 is a wasteful number, since it uses less digits than its factorization.

853868690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1151.

The product of its (nonzero) digits is 2488320, while the sum is 53.

The square root of 853868690 is about 29221.0316381883. The cubic root of 853868690 is about 948.7031945794.

The spelling of 853868690 in words is "eight hundred fifty-three million, eight hundred sixty-eight thousand, six hundred ninety".