871561396 has 12 divisors (see below), whose sum is σ = 1529842720. Its totient is φ = 434463480.

The previous prime is 871561391. The next prime is 871561399. The reversal of 871561396 is 693165178.

It is a happy number.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (871561391) 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, 327816 + ... + 330463.

Almost surely, 2^871561396 is an apocalyptic number.

It is an amenable number.

871561396 is a deficient number, since it is larger than the sum of its proper divisors (658281324).

871561396 is a wasteful number, since it uses less digits than its factorization.

871561396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 658614 (or 658612 counting only the distinct ones).

The product of its digits is 272160, while the sum is 46.

The square root of 871561396 is about 29522.2186835610. The cubic root of 871561396 is about 955.2110298153.

The spelling of 871561396 in words is "eight hundred seventy-one million, five hundred sixty-one thousand, three hundred ninety-six".