684941712 has 160 divisors (see below), whose sum is σ = 2190359808. Its totient is φ = 179601408.

The previous prime is 684941707. The next prime is 684941717. The reversal of 684941712 is 217149486.

It is an interprime number because it is at equal distance from previous prime (684941707) and next prime (684941717).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (684941717) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1017408 + ... + 1018080.

Almost surely, 2^684941712 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 684941712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1095179904).

684941712 is an abundant number, since it is smaller than the sum of its proper divisors (1505418096).

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

684941712 is a wasteful number, since it uses less digits than its factorization.

684941712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 937 (or 931 counting only the distinct ones).

The product of its digits is 96768, while the sum is 42.

The square root of 684941712 is about 26171.3910979145. The cubic root of 684941712 is about 881.4909779293.

The spelling of 684941712 in words is "six hundred eighty-four million, nine hundred forty-one thousand, seven hundred twelve".