6909492720 has 160 divisors (see below), whose sum is σ = 23098521600. Its totient is φ = 1698481152.

The previous prime is 6909492703. The next prime is 6909492763. The reversal of 6909492720 is 272949096.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 6909492720.

It is a congruent number.

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, 3927201 + ... + 3928959.

It is an arithmetic number, because the mean of its divisors is an integer number (144365760).

Almost surely, 2^6909492720 is an apocalyptic number.

6909492720 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6909492720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11549260800).

6909492720 is an abundant number, since it is smaller than the sum of its proper divisors (16189028880).

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

6909492720 is a wasteful number, since it uses less digits than its factorization.

6909492720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3047 (or 3041 counting only the distinct ones).

The product of its (nonzero) digits is 489888, while the sum is 48.

The square root of 6909492720 is about 83123.3584499568. The cubic root of 6909492720 is about 1904.6509070231.

The spelling of 6909492720 in words is "six billion, nine hundred nine million, four hundred ninety-two thousand, seven hundred twenty".