6840784740 has 48 divisors (see below), whose sum is σ = 19416595968. Its totient is φ = 1799218944.

The previous prime is 6840784733. The next prime is 6840784747. The reversal of 6840784740 is 474870486.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (6840784733) and next prime (6840784747).

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 6840784740.

It is not an unprimeable number, because it can be changed into a prime (6840784747) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 776532 + ... + 785291.

It is an arithmetic number, because the mean of its divisors is an integer number (404512416).

Almost surely, 2^6840784740 is an apocalyptic number.

6840784740 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6840784740 is an abundant number, since it is smaller than the sum of its proper divisors (12575811228).

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

6840784740 is a wasteful number, since it uses less digits than its factorization.

6840784740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1561908 (or 1561906 counting only the distinct ones).

The product of its (nonzero) digits is 1204224, while the sum is 48.

The square root of 6840784740 is about 82709.0366284120. The cubic root of 6840784740 is about 1898.3165827865.

The spelling of 6840784740 in words is "six billion, eight hundred forty million, seven hundred eighty-four thousand, seven hundred forty".