1280073568 has 12 divisors (see below), whose sum is σ = 2520144900. Its totient is φ = 640036768.

The previous prime is 1280073547. The next prime is 1280073569. The reversal of 1280073568 is 8653700821.

It is a self number, because there is not a number n which added to its sum of digits gives 1280073568.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1280073569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20001118 + ... + 20001181.

It is an arithmetic number, because the mean of its divisors is an integer number (210012075).

Almost surely, 2^1280073568 is an apocalyptic number.

It is an amenable number.

1280073568 is a deficient number, since it is larger than the sum of its proper divisors (1240071332).

1280073568 is an equidigital number, since it uses as much as digits as its factorization.

1280073568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40002309 (or 40002301 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 40.

The square root of 1280073568 is about 35778.1157692800. The cubic root of 1280073568 is about 1085.7878477265.

It can be divided in two parts, 12800 and 73568, that added together give a palindrome (86368).

The spelling of 1280073568 in words is "one billion, two hundred eighty million, seventy-three thousand, five hundred sixty-eight".