684423532 has 12 divisors (see below), whose sum is σ = 1289875216. Its totient is φ = 315887760.

The previous prime is 684423499. The next prime is 684423533. The reversal of 684423532 is 235324486.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 684423491 and 684423500.

It is not an unprimeable number, because it can be changed into a prime (684423533) 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, 6580944 + ... + 6581047.

Almost surely, 2^684423532 is an apocalyptic number.

It is an amenable number.

684423532 is a deficient number, since it is larger than the sum of its proper divisors (605451684).

684423532 is a wasteful number, since it uses less digits than its factorization.

684423532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13162008 (or 13162006 counting only the distinct ones).

The product of its digits is 138240, while the sum is 37.

The square root of 684423532 is about 26161.4894835902. The cubic root of 684423532 is about 881.2686299433.

The spelling of 684423532 in words is "six hundred eighty-four million, four hundred twenty-three thousand, five hundred thirty-two".