1290999320 has 64 divisors (see below), whose sum is σ = 3200994720. Its totient is φ = 465583104.

The previous prime is 1290999317. The next prime is 1290999331. The reversal of 1290999320 is 239990921.

It is a congruent number.

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, 6509 + ... + 51228.

Almost surely, 2^1290999320 is an apocalyptic number.

1290999320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1290999320 is an abundant number, since it is smaller than the sum of its proper divisors (1909995400).

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

1290999320 is a wasteful number, since it uses less digits than its factorization.

1290999320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57804 (or 57800 counting only the distinct ones).

The product of its (nonzero) digits is 78732, while the sum is 44.

The square root of 1290999320 is about 35930.4789837263. The cubic root of 1290999320 is about 1088.8682583131.

The spelling of 1290999320 in words is "one billion, two hundred ninety million, nine hundred ninety-nine thousand, three hundred twenty".