1285323312 has 240 divisors, whose sum is σ = 4205064192. Its totient is φ = 335301120.

The previous prime is 1285323223. The next prime is 1285323331. The reversal of 1285323312 is 2133235821.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1285323312.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3882987 + ... + 3883317.

Almost surely, 2^1285323312 is an apocalyptic number.

1285323312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1285323312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2102532096).

1285323312 is an abundant number, since it is smaller than the sum of its proper divisors (2919740880).

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

1285323312 is a wasteful number, since it uses less digits than its factorization.

1285323312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496 (or 483 counting only the distinct ones).

The product of its digits is 8640, while the sum is 30.

The square root of 1285323312 is about 35851.4059975338. The cubic root of 1285323312 is about 1087.2701410878.

The spelling of 1285323312 in words is "one billion, two hundred eighty-five million, three hundred twenty-three thousand, three hundred twelve".