684240606 has 72 divisors (see below), whose sum is σ = 1728533664. Its totient is φ = 195048000.

The previous prime is 684240589. The next prime is 684240637. The reversal of 684240606 is 606042486.

It is a happy number.

684240606 is a `hidden beast` number, since 6 + 8 + 4 + 2 + 40 + 606 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 661866 + ... + 662898.

It is an arithmetic number, because the mean of its divisors is an integer number (24007412).

Almost surely, 2^684240606 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 684240606, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (864266832).

684240606 is an abundant number, since it is smaller than the sum of its proper divisors (1044293058).

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

684240606 is a wasteful number, since it uses less digits than its factorization.

684240606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1806 (or 1796 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 36.

The square root of 684240606 is about 26157.9931569683. The cubic root of 684240606 is about 881.1901106728.

The spelling of 684240606 in words is "six hundred eighty-four million, two hundred forty thousand, six hundred six".