1284217939398 has 16 divisors (see below), whose sum is σ = 2569901065776. Its totient is φ = 427828448640.

The previous prime is 1284217939349. The next prime is 1284217939399. The reversal of 1284217939398 is 8939397124821.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1284217939399) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61038063 + ... + 61059098.

It is an arithmetic number, because the mean of its divisors is an integer number (160618816611).

Almost surely, 2^{1284217939398} is an apocalyptic number.

1284217939398 is an abundant number, since it is smaller than the sum of its proper divisors (1285683126378).

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

1284217939398 is a wasteful number, since it uses less digits than its factorization.

1284217939398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122098919.

The product of its digits is 47029248, while the sum is 66.

The spelling of 1284217939398 in words is "one trillion, two hundred eighty-four billion, two hundred seventeen million, nine hundred thirty-nine thousand, three hundred ninety-eight".