1280322560 has 176 divisors, whose sum is σ = 3395727360. Its totient is φ = 459325440.

The previous prime is 1280322551. The next prime is 1280322569. The reversal of 1280322560 is 652230821.

It is an interprime number because it is at equal distance from previous prime (1280322551) and next prime (1280322569).

It is a tau number, because it is divible by the number of its divisors (176).

It is not an unprimeable number, because it can be changed into a prime (1280322569) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7152551 + ... + 7152729.

Almost surely, 2^1280322560 is an apocalyptic number.

1280322560 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 1280322560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1697863680).

1280322560 is an abundant number, since it is smaller than the sum of its proper divisors (2115404800).

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

1280322560 is a wasteful number, since it uses less digits than its factorization.

1280322560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342 (or 324 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 1280322560 is about 35781.5952690765. The cubic root of 1280322560 is about 1085.8582434098.

The spelling of 1280322560 in words is "one billion, two hundred eighty million, three hundred twenty-two thousand, five hundred sixty".