1068447890 has 16 divisors (see below), whose sum is σ = 1975185432. Its totient is φ = 415828224.

The previous prime is 1068447871. The next prime is 1068447893. The reversal of 1068447890 is 987448601.

It can be written as a sum of positive squares in 4 ways, for example, as 957840601 + 110607289 = 30949^2 + 10517^2 .

It is a super-2 number, since 2×1068447890² = 2283161787290904200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1068447893) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1443479 + ... + 1444218.

Almost surely, 2^1068447890 is an apocalyptic number.

1068447890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1068447890 is a deficient number, since it is larger than the sum of its proper divisors (906737542).

1068447890 is a wasteful number, since it uses less digits than its factorization.

1068447890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2887741.

The product of its (nonzero) digits is 387072, while the sum is 47.

The square root of 1068447890 is about 32687.1211641527. The cubic root of 1068447890 is about 1022.3143303415.

The spelling of 1068447890 in words is "one billion, sixty-eight million, four hundred forty-seven thousand, eight hundred ninety".