684139862 has 24 divisors (see below), whose sum is σ = 1205591040. Its totient is φ = 290295600.

The previous prime is 684139861. The next prime is 684139871. The reversal of 684139862 is 268931486.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684139861) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24662 + ... + 44457.

It is an arithmetic number, because the mean of its divisors is an integer number (50232960).

Almost surely, 2^684139862 is an apocalyptic number.

684139862 is a deficient number, since it is larger than the sum of its proper divisors (521451178).

684139862 is a wasteful number, since it uses less digits than its factorization.

684139862 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69236 (or 69229 counting only the distinct ones).

The product of its digits is 497664, while the sum is 47.

The square root of 684139862 is about 26156.0674031858. The cubic root of 684139862 is about 881.1468612792.

The spelling of 684139862 in words is "six hundred eighty-four million, one hundred thirty-nine thousand, eight hundred sixty-two".