1284260436 has 72 divisors (see below), whose sum is σ = 3373680128. Its totient is φ = 411480000.

The previous prime is 1284260429. The next prime is 1284260459. The reversal of 1284260436 is 6340624821.

1284260436 is a `hidden beast` number, since 1 + 2 + 8 + 42 + 604 + 3 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1284260436.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 164706 + ... + 172326.

Almost surely, 2^1284260436 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 1284260436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1686840064).

1284260436 is an abundant number, since it is smaller than the sum of its proper divisors (2089419692).

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

1284260436 is a wasteful number, since it uses less digits than its factorization.

1284260436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7813 (or 7808 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 36.

The square root of 1284260436 is about 35836.5795800883. The cubic root of 1284260436 is about 1086.9703586601.

The spelling of 1284260436 in words is "one billion, two hundred eighty-four million, two hundred sixty thousand, four hundred thirty-six".