1280552720 has 40 divisors (see below), whose sum is σ = 2984273280. Its totient is φ = 511018880.

The previous prime is 1280552719. The next prime is 1280552729. The reversal of 1280552720 is 272550821.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (1280552729) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15911 + ... + 53049.

It is an arithmetic number, because the mean of its divisors is an integer number (74606832).

Almost surely, 2^1280552720 is an apocalyptic number.

1280552720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1280552720 is an abundant number, since it is smaller than the sum of its proper divisors (1703720560).

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

1280552720 is a wasteful number, since it uses less digits than its factorization.

1280552720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37583 (or 37577 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 32.

The square root of 1280552720 is about 35784.8113031213. The cubic root of 1280552720 is about 1085.9233067427.

The spelling of 1280552720 in words is "one billion, two hundred eighty million, five hundred fifty-two thousand, seven hundred twenty".