3287990281 has 9 divisors (see below), whose sum is σ = 3493814421. Its totient is φ = 3093661632.

The previous prime is 3287990269. The next prime is 3287990287. The reversal of 3287990281 is 1820997823.

The square root of 3287990281 is 57341.

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

It can be written as a sum of positive squares in 4 ways, for example, as 2260146681 + 1027843600 = 47541^2 + 32060^2 .

It is not a de Polignac number, because 3287990281 - 2⁹ = 3287989769 is a prime.

It is a super-2 number, since 2×3287990281² = 21621760175900917922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3287990287) 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, 973111 + ... + 976483.

Almost surely, 2^3287990281 is an apocalyptic number.

3287990281 is the 57341-st square number.

3287990281 is the 28671-st centered octagonal number.

It is an amenable number.

3287990281 is a deficient number, since it is larger than the sum of its proper divisors (205824140).

3287990281 is an frugal number, since it uses more digits than its factorization.

3287990281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6780 (or 3390 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 49.

The cubic root of 3287990281 is about 1486.9972831817.

Multiplying 3287990281 by its sum of digits (49), we get a square (161111523769 = 401387²).

The spelling of 3287990281 in words is "three billion, two hundred eighty-seven million, nine hundred ninety thousand, two hundred eighty-one".