2684309840 has 40 divisors (see below), whose sum is σ = 6442349568. Its totient is φ = 1039086720.

The previous prime is 2684309801. The next prime is 2684309863. The reversal of 2684309840 is 489034862.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 2684309791 and 2684309800.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 538712 + ... + 543671.

Almost surely, 2^2684309840 is an apocalyptic number.

2684309840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2684309840 is an abundant number, since it is smaller than the sum of its proper divisors (3758039728).

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

2684309840 is a wasteful number, since it uses less digits than its factorization.

2684309840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1082427 (or 1082421 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 44.

The square root of 2684309840 is about 51810.3256117929. The cubic root of 2684309840 is about 1389.7741019645.

The spelling of 2684309840 in words is "two billion, six hundred eighty-four million, three hundred nine thousand, eight hundred forty".