7115409280 has 128 divisors (see below), whose sum is σ = 19707526080. Its totient is φ = 2406039552.

The previous prime is 7115409241. The next prime is 7115409299. The reversal of 7115409280 is 829045117.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 316162 + ... + 337918.

Almost surely, 2^7115409280 is an apocalyptic number.

7115409280 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 7115409280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9853763040).

7115409280 is an abundant number, since it is smaller than the sum of its proper divisors (12592116800).

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

7115409280 is a wasteful number, since it uses less digits than its factorization.

7115409280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21856 (or 21844 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 37.

The square root of 7115409280 is about 84352.8854278264. The cubic root of 7115409280 is about 1923.3867885573.

The spelling of 7115409280 in words is "seven billion, one hundred fifteen million, four hundred nine thousand, two hundred eighty".