1283699328 has 64 divisors (see below), whose sum is σ = 3430912800. Its totient is φ = 425253888.

The previous prime is 1283699321. The next prime is 1283699377. The reversal of 1283699328 is 8239963821.

It is a tau number, because it is divible by the number of its divisors (64).

It is not an unprimeable number, because it can be changed into a prime (1283699321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52338 + ... + 72846.

Almost surely, 2^1283699328 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 1283699328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1715456400).

1283699328 is an abundant number, since it is smaller than the sum of its proper divisors (2147213472).

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

1283699328 is a wasteful number, since it uses less digits than its factorization.

1283699328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20689 (or 20677 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 51.

The square root of 1283699328 is about 35828.7500200607. The cubic root of 1283699328 is about 1086.8120323597.

The spelling of 1283699328 in words is "one billion, two hundred eighty-three million, six hundred ninety-nine thousand, three hundred twenty-eight".