1282630816 has 12 divisors (see below), whose sum is σ = 2525179482. Its totient is φ = 641315392.

The previous prime is 1282630813. The next prime is 1282630829. The reversal of 1282630816 is 6180362821.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1196883216 + 85747600 = 34596^2 + 9260^2 .

It is not an unprimeable number, because it can be changed into a prime (1282630813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20041075 + ... + 20041138.

Almost surely, 2^1282630816 is an apocalyptic number.

1282630816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1282630816 is a deficient number, since it is larger than the sum of its proper divisors (1242548666).

1282630816 is an equidigital number, since it uses as much as digits as its factorization.

1282630816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40082223 (or 40082215 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 1282630816 is about 35813.8355387970. The cubic root of 1282630816 is about 1086.5104056406.

The spelling of 1282630816 in words is "one billion, two hundred eighty-two million, six hundred thirty thousand, eight hundred sixteen".