1280752660 has 24 divisors (see below), whose sum is σ = 2934088416. Its totient is φ = 465728160.

The previous prime is 1280752639. The next prime is 1280752667. The reversal of 1280752660 is 662570821.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1280752667) 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, 2910582 + ... + 2911021.

It is an arithmetic number, because the mean of its divisors is an integer number (122253684).

Almost surely, 2^1280752660 is an apocalyptic number.

1280752660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1280752660 is an abundant number, since it is smaller than the sum of its proper divisors (1653335756).

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

1280752660 is a wasteful number, since it uses less digits than its factorization.

1280752660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5821623 (or 5821621 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 1280752660 is about 35787.6048374294. The cubic root of 1280752660 is about 1085.9798209347.

The spelling of 1280752660 in words is "one billion, two hundred eighty million, seven hundred fifty-two thousand, six hundred sixty".