7277921280 has 880 divisors, whose sum is σ = 31386896640. Its totient is φ = 1576599552.

The previous prime is 7277921267. The next prime is 7277921351. The reversal of 7277921280 is 821297727.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 66769866 + ... + 66769974.

It is an arithmetic number, because the mean of its divisors is an integer number (35666928).

Almost surely, 2^7277921280 is an apocalyptic number.

7277921280 is a gapful number since it is divisible by the number (70) 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 7277921280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15693448320).

7277921280 is an abundant number, since it is smaller than the sum of its proper divisors (24108975360).

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

7277921280 is a wasteful number, since it uses less digits than its factorization.

7277921280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176 (or 149 counting only the distinct ones).

The product of its (nonzero) digits is 197568, while the sum is 45.

The square root of 7277921280 is about 85310.7336740225. The cubic root of 7277921280 is about 1937.9197313609.

The spelling of 7277921280 in words is "seven billion, two hundred seventy-seven million, nine hundred twenty-one thousand, two hundred eighty".