6723244840 has 128 divisors (see below), whose sum is σ = 16816988160. Its totient is φ = 2402970624.

The previous prime is 6723244831. The next prime is 6723244859. The reversal of 6723244840 is 484423276.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 6723244793 and 6723244802.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4289737 + ... + 4291303.

It is an arithmetic number, because the mean of its divisors is an integer number (131382720).

Almost surely, 2^6723244840 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 6723244840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8408494080).

6723244840 is an abundant number, since it is smaller than the sum of its proper divisors (10093743320).

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

6723244840 is a wasteful number, since it uses less digits than its factorization.

6723244840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1851 (or 1847 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 40.

The square root of 6723244840 is about 81995.3952365619. The cubic root of 6723244840 is about 1887.3812766282.

The spelling of 6723244840 in words is "six billion, seven hundred twenty-three million, two hundred forty-four thousand, eight hundred forty".