684870102 has 24 divisors (see below), whose sum is σ = 1695869136. Its totient is φ = 195677136.

The previous prime is 684870059. The next prime is 684870113. The reversal of 684870102 is 201078486.

It is a super-2 number, since 2×684870102² = 938094113226980808, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2717613 + ... + 2717864.

It is an arithmetic number, because the mean of its divisors is an integer number (70661214).

Almost surely, 2^684870102 is an apocalyptic number.

684870102 is an abundant number, since it is smaller than the sum of its proper divisors (1010999034).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

684870102 is a wasteful number, since it uses less digits than its factorization.

684870102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5435492 (or 5435489 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 684870102 is about 26170.0229652173. The cubic root of 684870102 is about 881.4602571795.

The spelling of 684870102 in words is "six hundred eighty-four million, eight hundred seventy thousand, one hundred two".