1280299628 has 24 divisors (see below), whose sum is σ = 2314994304. Its totient is φ = 618912000.

The previous prime is 1280299607. The next prime is 1280299649. The reversal of 1280299628 is 8269920821.

It is an interprime number because it is at equal distance from previous prime (1280299607) and next prime (1280299649).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144626 + ... + 153222.

It is an arithmetic number, because the mean of its divisors is an integer number (96458096).

Almost surely, 2^1280299628 is an apocalyptic number.

It is an amenable number.

1280299628 is a deficient number, since it is larger than the sum of its proper divisors (1034694676).

1280299628 is a wasteful number, since it uses less digits than its factorization.

1280299628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9833 (or 9831 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 47.

The square root of 1280299628 is about 35781.2748235722. The cubic root of 1280299628 is about 1085.8517603951.

The spelling of 1280299628 in words is "one billion, two hundred eighty million, two hundred ninety-nine thousand, six hundred twenty-eight".