684363444 has 24 divisors (see below), whose sum is σ = 1597683360. Its totient is φ = 228001824.

The previous prime is 684363437. The next prime is 684363461. The reversal of 684363444 is 444363486.

It is a super-2 number, since 2×684363444² = 936706646967082272, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 684363396 and 684363405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10747 + ... + 38525.

It is an arithmetic number, because the mean of its divisors is an integer number (66570140).

Almost surely, 2^684363444 is an apocalyptic number.

It is an amenable number.

684363444 is an abundant number, since it is smaller than the sum of its proper divisors (913319916).

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

684363444 is a wasteful number, since it uses less digits than its factorization.

684363444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29839 (or 29837 counting only the distinct ones).

The product of its digits is 663552, while the sum is 42.

The square root of 684363444 is about 26160.3410528227. The cubic root of 684363444 is about 881.2428392759.

Adding to 684363444 its sum of digits (42), we get a palindrome (684363486).

The spelling of 684363444 in words is "six hundred eighty-four million, three hundred sixty-three thousand, four hundred forty-four".