1280276368 has 80 divisors (see below), whose sum is σ = 2926491264. Its totient is φ = 531118080.

The previous prime is 1280276339. The next prime is 1280276383. The reversal of 1280276368 is 8636720821.

It is a super-3 number, since 3×1280276368³ (a number of 28 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 940008 + ... + 941368.

Almost surely, 2^1280276368 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1280276368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1463245632).

1280276368 is an abundant number, since it is smaller than the sum of its proper divisors (1646214896).

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

1280276368 is a wasteful number, since it uses less digits than its factorization.

1280276368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1640 (or 1634 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 43.

The square root of 1280276368 is about 35780.9497917537. The cubic root of 1280276368 is about 1085.8451845737.

The spelling of 1280276368 in words is "one billion, two hundred eighty million, two hundred seventy-six thousand, three hundred sixty-eight".