684820632 has 64 divisors (see below), whose sum is σ = 1761626880. Its totient is φ = 221749632.

The previous prime is 684820627. The next prime is 684820649. The reversal of 684820632 is 236028486.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 128403 + ... + 133629.

It is an arithmetic number, because the mean of its divisors is an integer number (27525420).

Almost surely, 2^684820632 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 684820632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (880813440).

684820632 is an abundant number, since it is smaller than the sum of its proper divisors (1076806248).

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

684820632 is a wasteful number, since it uses less digits than its factorization.

684820632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5392 (or 5388 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 39.

The square root of 684820632 is about 26169.0777827573. The cubic root of 684820632 is about 881.4390332575.

The spelling of 684820632 in words is "six hundred eighty-four million, eight hundred twenty thousand, six hundred thirty-two".