7858728580 has 12 divisors (see below), whose sum is σ = 16503330060. Its totient is φ = 3143491424.

The previous prime is 7858728571. The next prime is 7858728607. The reversal of 7858728580 is 858278587.

It can be written as a sum of positive squares in 2 ways, for example, as 1809311296 + 6049417284 = 42536^2 + 77778^2 .

It is a super-2 number, since 2×7858728580² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 196468195 + ... + 196468234.

It is an arithmetic number, because the mean of its divisors is an integer number (1375277505).

Almost surely, 2^7858728580 is an apocalyptic number.

It is an amenable number.

7858728580 is an abundant number, since it is smaller than the sum of its proper divisors (8644601480).

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

7858728580 is a wasteful number, since it uses less digits than its factorization.

7858728580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392936438 (or 392936436 counting only the distinct ones).

The product of its (nonzero) digits is 10035200, while the sum is 58.

The square root of 7858728580 is about 88649.4702747851. The cubic root of 7858728580 is about 1988.1573964449.

The spelling of 7858728580 in words is "seven billion, eight hundred fifty-eight million, seven hundred twenty-eight thousand, five hundred eighty".