684425916 has 96 divisors (see below), whose sum is σ = 1891169280. Its totient is φ = 213311232.

The previous prime is 684425873. The next prime is 684425939. The reversal of 684425916 is 619524486.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 298125 + ... + 300411.

It is an arithmetic number, because the mean of its divisors is an integer number (19699680).

Almost surely, 2^684425916 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 684425916, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (945584640).

684425916 is an abundant number, since it is smaller than the sum of its proper divisors (1206743364).

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

684425916 is a wasteful number, since it uses less digits than its factorization.

684425916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2480 (or 2472 counting only the distinct ones).

The product of its digits is 414720, while the sum is 45.

The square root of 684425916 is about 26161.5350467055. The cubic root of 684425916 is about 881.2696531606.

The spelling of 684425916 in words is "six hundred eighty-four million, four hundred twenty-five thousand, nine hundred sixteen".