1280840048 has 10 divisors (see below), whose sum is σ = 2481627624. Its totient is φ = 640420016.

The previous prime is 1280840047. The next prime is 1280840059. The reversal of 1280840048 is 8400480821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1280840047) by changing a digit.

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 as a sum of consecutive naturals, namely, 40026236 + ... + 40026267.

Almost surely, 2^1280840048 is an apocalyptic number.

It is an amenable number.

1280840048 is a deficient number, since it is larger than the sum of its proper divisors (1200787576).

1280840048 is an equidigital number, since it uses as much as digits as its factorization.

1280840048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80052511 (or 80052505 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 35.

The square root of 1280840048 is about 35788.8257421224. The cubic root of 1280840048 is about 1086.0045198089.

The spelling of 1280840048 in words is "one billion, two hundred eighty million, eight hundred forty thousand, forty-eight".