7861328488 has 16 divisors (see below), whose sum is σ = 15873836580. Its totient is φ = 3628305408.

The previous prime is 7861328459. The next prime is 7861328507. The reversal of 7861328488 is 8848231687.

It can be written as a sum of positive squares in 2 ways, for example, as 7475677444 + 385651044 = 86462^2 + 19638^2 .

It is a super-2 number, since 2×7861328488² (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, 37794745 + ... + 37794952.

Almost surely, 2^7861328488 is an apocalyptic number.

It is an amenable number.

7861328488 is an abundant number, since it is smaller than the sum of its proper divisors (8012508092).

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

7861328488 is a wasteful number, since it uses less digits than its factorization.

7861328488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75589716 (or 75589712 counting only the distinct ones).

The product of its digits is 4128768, while the sum is 55.

The square root of 7861328488 is about 88664.1330414954. The cubic root of 7861328488 is about 1988.3766200487.

The spelling of 7861328488 in words is "seven billion, eight hundred sixty-one million, three hundred twenty-eight thousand, four hundred eighty-eight".