1280230656 has 72 divisors (see below), whose sum is σ = 3414052320. Its totient is φ = 425895936.

The previous prime is 1280230649. The next prime is 1280230663. The reversal of 1280230656 is 6560320821.

It is an interprime number because it is at equal distance from previous prime (1280230649) and next prime (1280230663).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 474046 + ... + 476738.

Almost surely, 2^1280230656 is an apocalyptic number.

1280230656 is a gapful number since it is divisible by the number (16) 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 1280230656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1707026160).

1280230656 is an abundant number, since it is smaller than the sum of its proper divisors (2133821664).

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

1280230656 is an equidigital number, since it uses as much as digits as its factorization.

1280230656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3331 (or 3317 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 1280230656 is about 35780.3110103867. The cubic root of 1280230656 is about 1085.8322611282.

The spelling of 1280230656 in words is "one billion, two hundred eighty million, two hundred thirty thousand, six hundred fifty-six".