1282663680 has 144 divisors (see below), whose sum is σ = 4196937024. Its totient is φ = 333660160.

The previous prime is 1282663667. The next prime is 1282663687. The reversal of 1282663680 is 863662821.

It is a super-2 number, since 2×1282663680² = 3290452231982284800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1282663687) 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 in 15 ways as a sum of consecutive naturals, for example, 153367 + ... + 161513.

It is an arithmetic number, because the mean of its divisors is an integer number (29145396).

Almost surely, 2^1282663680 is an apocalyptic number.

1282663680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1282663680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2098468512).

1282663680 is an abundant number, since it is smaller than the sum of its proper divisors (2914273344).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1282663680 is an equidigital number, since it uses as much as digits as its factorization.

1282663680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8212 (or 8198 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 42.

The square root of 1282663680 is about 35814.2943529535. The cubic root of 1282663680 is about 1086.5196852069.

The spelling of 1282663680 in words is "one billion, two hundred eighty-two million, six hundred sixty-three thousand, six hundred eighty".