1284508428 has 96 divisors (see below), whose sum is σ = 3568094208. Its totient is φ = 351993600.

The previous prime is 1284508399. The next prime is 1284508447. The reversal of 1284508428 is 8248054821.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 1284508428.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 217758 + ... + 223578.

It is an arithmetic number, because the mean of its divisors is an integer number (37167648).

Almost surely, 2^1284508428 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 1284508428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1784047104).

1284508428 is an abundant number, since it is smaller than the sum of its proper divisors (2283585780).

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

1284508428 is a wasteful number, since it uses less digits than its factorization.

1284508428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5943 (or 5941 counting only the distinct ones).

The product of its (nonzero) digits is 163840, while the sum is 42.

The square root of 1284508428 is about 35840.0394531033. The cubic root of 1284508428 is about 1087.0403191854.

The spelling of 1284508428 in words is "one billion, two hundred eighty-four million, five hundred eight thousand, four hundred twenty-eight".