1284894492988 has 24 divisors (see below), whose sum is σ = 2346628193280. Its totient is φ = 614436416880.

The previous prime is 1284894492943. The next prime is 1284894493007. The reversal of 1284894492988 is 8892944984821.

It is a happy number.

It is a super-2 number, since 2×1284894492988² (a number of 25 digits) contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 161428 + ... + 1611163.

It is an arithmetic number, because the mean of its divisors is an integer number (97776174720).

Almost surely, 2^{1284894492988} is an apocalyptic number.

It is an amenable number.

1284894492988 is a deficient number, since it is larger than the sum of its proper divisors (1061733700292).

1284894492988 is a wasteful number, since it uses less digits than its factorization.

1284894492988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1780497 (or 1780495 counting only the distinct ones).

The product of its digits is 764411904, while the sum is 76.

The spelling of 1284894492988 in words is "one trillion, two hundred eighty-four billion, eight hundred ninety-four million, four hundred ninety-two thousand, nine hundred eighty-eight".