684603816 has 32 divisors (see below), whose sum is σ = 1843164960. Its totient is φ = 210647232.

The previous prime is 684603811. The next prime is 684603847. The reversal of 684603816 is 618306486.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (684603811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1096810 + ... + 1097433.

It is an arithmetic number, because the mean of its divisors is an integer number (57598905).

Almost surely, 2^684603816 is an apocalyptic number.

It is an amenable number.

684603816 is an abundant number, since it is smaller than the sum of its proper divisors (1158561144).

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

684603816 is a wasteful number, since it uses less digits than its factorization.

684603816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2194265 (or 2194261 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 42.

The square root of 684603816 is about 26164.9348556422. The cubic root of 684603816 is about 881.3460014724.

The spelling of 684603816 in words is "six hundred eighty-four million, six hundred three thousand, eight hundred sixteen".