6928781376 has 224 divisors, whose sum is σ = 21240414720. Its totient is φ = 1987729920.

The previous prime is 6928781369. The next prime is 6928781381. The reversal of 6928781376 is 6731878296.

It is a super-2 number, since 2×6928781376² = 96016022712808906752, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (57).

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, 4854775 + ... + 4856201.

It is an arithmetic number, because the mean of its divisors is an integer number (94823280).

Almost surely, 2^6928781376 is an apocalyptic number.

6928781376 is a gapful number since it is divisible by the number (66) 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 6928781376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10620207360).

6928781376 is an abundant number, since it is smaller than the sum of its proper divisors (14311633344).

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

6928781376 is a wasteful number, since it uses less digits than its factorization.

6928781376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1494 (or 1462 counting only the distinct ones).

The product of its digits is 6096384, while the sum is 57.

The square root of 6928781376 is about 83239.3018711714. The cubic root of 6928781376 is about 1906.4216121612.

The spelling of 6928781376 in words is "six billion, nine hundred twenty-eight million, seven hundred eighty-one thousand, three hundred seventy-six".