861855914 has 16 divisors (see below), whose sum is σ = 1298245320. Its totient is φ = 429112320.

The previous prime is 861855913. The next prime is 861855937. The reversal of 861855914 is 419558168.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 806844025 + 55011889 = 28405^2 + 7417^2 .

It is not an unprimeable number, because it can be changed into a prime (861855913) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 700652 + ... + 701880.

Almost surely, 2^861855914 is an apocalyptic number.

861855914 is a deficient number, since it is larger than the sum of its proper divisors (436389406).

861855914 is a wasteful number, since it uses less digits than its factorization.

861855914 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2425.

The product of its digits is 345600, while the sum is 47.

The square root of 861855914 is about 29357.3826149403. The cubic root of 861855914 is about 951.6521257102.

The spelling of 861855914 in words is "eight hundred sixty-one million, eight hundred fifty-five thousand, nine hundred fourteen".