7281402216 has 128 divisors (see below), whose sum is σ = 20536104960. Its totient is φ = 2132211200.

The previous prime is 7281402199. The next prime is 7281402217. The reversal of 7281402216 is 6122041827.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (7281402217) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1155025 + ... + 1161311.

It is an arithmetic number, because the mean of its divisors is an integer number (160438320).

Almost surely, 2^7281402216 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7281402216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10268052480).

7281402216 is an abundant number, since it is smaller than the sum of its proper divisors (13254702744).

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

7281402216 is a wasteful number, since it uses less digits than its factorization.

7281402216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6455 (or 6451 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 7281402216 is about 85331.1327476672. The cubic root of 7281402216 is about 1938.2286427983.

The spelling of 7281402216 in words is "seven billion, two hundred eighty-one million, four hundred two thousand, two hundred sixteen".