684851836 has 12 divisors (see below), whose sum is σ = 1214908912. Its totient is φ = 337735008.

The previous prime is 684851831. The next prime is 684851837. The reversal of 684851836 is 638158486.

It is a self number, because there is not a number n which added to its sum of digits gives 684851836.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684851831) 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, 1172400 + ... + 1172983.

Almost surely, 2^684851836 is an apocalyptic number.

It is an amenable number.

684851836 is a deficient number, since it is larger than the sum of its proper divisors (530057076).

684851836 is a wasteful number, since it uses less digits than its factorization.

684851836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2345460 (or 2345458 counting only the distinct ones).

The product of its digits is 1105920, while the sum is 49.

The square root of 684851836 is about 26169.6739758064. The cubic root of 684851836 is about 881.4524207075.

The spelling of 684851836 in words is "six hundred eighty-four million, eight hundred fifty-one thousand, eight hundred thirty-six".