8128284649 has 9 divisors (see below), whose sum is σ = 8228763013. Its totient is φ = 8029021792.

The previous prime is 8128284631. The next prime is 8128284673. The reversal of 8128284649 is 9464828218.

The square root of 8128284649 is 90157.

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 6273432025 + 1854852624 = 79205^2 + 43068^2 .

It is not a de Polignac number, because 8128284649 - 2²³ = 8119896041 is a prime.

It is a super-2 number, since 2×8128284649² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8128284596 and 8128284605.

It is not an unprimeable number, because it can be changed into a prime (8128284679) 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, 8023467 + ... + 8024479.

Almost surely, 2^8128284649 is an apocalyptic number.

8128284649 is a gapful number since it is divisible by the number (89) formed by its first and last digit.

8128284649 is the 90157-th square number.

8128284649 is the 45079-th centered octagonal number.

It is an amenable number.

8128284649 is a deficient number, since it is larger than the sum of its proper divisors (100478364).

8128284649 is an frugal number, since it uses more digits than its factorization.

8128284649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2204 (or 1102 counting only the distinct ones).

The product of its digits is 1769472, while the sum is 52.

The cubic root of 8128284649 is about 2010.6337489064.

The spelling of 8128284649 in words is "eight billion, one hundred twenty-eight million, two hundred eighty-four thousand, six hundred forty-nine".