6928649280 has 392 divisors, whose sum is σ = 28277466432. Its totient is φ = 1583318016.

The previous prime is 6928649261. The next prime is 6928649281. The reversal of 6928649280 is 829468296.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (6928649281) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 1630839 + ... + 1635081.

Almost surely, 2^6928649280 is an apocalyptic number.

6928649280 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 6928649280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14138733216).

6928649280 is an abundant number, since it is smaller than the sum of its proper divisors (21348817152).

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

6928649280 is an equidigital number, since it uses as much as digits as its factorization.

6928649280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4285 (or 4260 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 54.

The square root of 6928649280 is about 83238.5083960543. The cubic root of 6928649280 is about 1906.4094968865.

The spelling of 6928649280 in words is "six billion, nine hundred twenty-eight million, six hundred forty-nine thousand, two hundred eighty".