684563634 has 48 divisors (see below), whose sum is σ = 1529708544. Its totient is φ = 221112000.

The previous prime is 684563623. The next prime is 684563639. The reversal of 684563634 is 436365486.

684563634 is a `hidden beast` number, since 6 + 8 + 4 + 5 + 6 + 3 + 634 = 666.

684563634 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 684563634.

It is not an unprimeable number, because it can be changed into a prime (684563639) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 108367 + ... + 114509.

It is an arithmetic number, because the mean of its divisors is an integer number (31868928).

Almost surely, 2^684563634 is an apocalyptic number.

684563634 is an abundant number, since it is smaller than the sum of its proper divisors (845144910).

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

684563634 is a wasteful number, since it uses less digits than its factorization.

684563634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6343 (or 6340 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 45.

The square root of 684563634 is about 26164.1669846376. The cubic root of 684563634 is about 881.3287579528.

The spelling of 684563634 in words is "six hundred eighty-four million, five hundred sixty-three thousand, six hundred thirty-four".