7280491680 has 768 divisors, whose sum is σ = 32572108800. Its totient is φ = 1474744320.

The previous prime is 7280491679. The next prime is 7280491697. The reversal of 7280491680 is 861940827.

7280491680 is a `hidden beast` number, since 7 + 2 + 80 + 491 + 6 + 80 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 14303266 + ... + 14303774.

It is an arithmetic number, because the mean of its divisors is an integer number (42411600).

Almost surely, 2^7280491680 is an apocalyptic number.

7280491680 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 7280491680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16286054400).

7280491680 is an abundant number, since it is smaller than the sum of its proper divisors (25291617120).

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

7280491680 is a wasteful number, since it uses less digits than its factorization.

7280491680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 594 (or 580 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The square root of 7280491680 is about 85325.7972713997. The cubic root of 7280491680 is about 1938.1478478968.

The spelling of 7280491680 in words is "seven billion, two hundred eighty million, four hundred ninety-one thousand, six hundred eighty".