7985030881 has 9 divisors (see below), whose sum is σ = 8043992019. Its totient is φ = 7926500736.

The previous prime is 7985030873. The next prime is 7985030929. The reversal of 7985030881 is 1880305897.

The square root of 7985030881 is 89359.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 1934680225 + 6050350656 = 43985^2 + 77784^2 .

It is not a de Polignac number, because 7985030881 - 2³ = 7985030873 is a prime.

It is a super-2 number, since 2×7985030881² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7985030821) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 17246056 + ... + 17246518.

It is an arithmetic number, because the mean of its divisors is an integer number (893776891).

Almost surely, 2^7985030881 is an apocalyptic number.

7985030881 is the 89359-th square number.

7985030881 is the 44680-th centered octagonal number.

It is an amenable number.

7985030881 is a deficient number, since it is larger than the sum of its proper divisors (58961138).

7985030881 is an frugal number, since it uses more digits than its factorization.

7985030881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1312 (or 656 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 49.

The cubic root of 7985030881 is about 1998.7517945703.

Multiplying 7985030881 by its sum of digits (49), we get a square (391266513169 = 625513²).

The spelling of 7985030881 in words is "seven billion, nine hundred eighty-five million, thirty thousand, eight hundred eighty-one".