1280008000 has 56 divisors (see below), whose sum is σ = 3169959624. Its totient is φ = 512000000.

The previous prime is 1280007977. The next prime is 1280008021. The reversal of 1280008000 is 8000821.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 39841344 + 1240166656 = 6312^2 + 35216^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72001 + ... + 88000.

Almost surely, 2^1280008000 is an apocalyptic number.

1280008000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1280008000 is an abundant number, since it is smaller than the sum of its proper divisors (1889951624).

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

1280008000 is an equidigital number, since it uses as much as digits as its factorization.

1280008000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160028 (or 160008 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

The square root of 1280008000 is about 35777.1994432208. The cubic root of 1280008000 is about 1085.7693086479.

Adding to 1280008000 its reverse (8000821), we get a palindrome (1288008821).

It can be divided in two parts, 128000 and 8000, that multiplied together give a square (1024000000 = 32000²).

The spelling of 1280008000 in words is "one billion, two hundred eighty million, eight thousand".