1283312478 has 64 divisors (see below), whose sum is σ = 3092682240. Its totient is φ = 346799232.

The previous prime is 1283312453. The next prime is 1283312483. The reversal of 1283312478 is 8742133821.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 794800 + ... + 796412.

It is an arithmetic number, because the mean of its divisors is an integer number (48323160).

Almost surely, 2^1283312478 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1283312478, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1546341120).

1283312478 is an abundant number, since it is smaller than the sum of its proper divisors (1809369762).

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

1283312478 is a wasteful number, since it uses less digits than its factorization.

1283312478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2641.

The product of its digits is 64512, while the sum is 39.

The square root of 1283312478 is about 35823.3510157830. The cubic root of 1283312478 is about 1086.7028490886.

The spelling of 1283312478 in words is "one billion, two hundred eighty-three million, three hundred twelve thousand, four hundred seventy-eight".