1284436644 has 24 divisors (see below), whose sum is σ = 2999156160. Its totient is φ = 427840224.

The previous prime is 1284436627. The next prime is 1284436663. The reversal of 1284436644 is 4466344821.

It is a super-3 number, since 3×1284436644³ (a number of 28 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1284436596 and 1284436605.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20304 + ... + 54599.

It is an arithmetic number, because the mean of its divisors is an integer number (124964840).

Almost surely, 2^1284436644 is an apocalyptic number.

It is an amenable number.

1284436644 is an abundant number, since it is smaller than the sum of its proper divisors (1714719516).

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

1284436644 is a wasteful number, since it uses less digits than its factorization.

1284436644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76339 (or 76337 counting only the distinct ones).

The product of its digits is 442368, while the sum is 42.

The square root of 1284436644 is about 35839.0379893211. The cubic root of 1284436644 is about 1087.0200692713.

The spelling of 1284436644 in words is "one billion, two hundred eighty-four million, four hundred thirty-six thousand, six hundred forty-four".