1284327198 has 128 divisors (see below), whose sum is σ = 3571200000. Its totient is φ = 332385120.

The previous prime is 1284327197. The next prime is 1284327229. The reversal of 1284327198 is 8917234821.

It is a happy number.

1284327198 is a `hidden beast` number, since 1 + 28 + 432 + 7 + 198 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1284327193) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2074533 + ... + 2075151.

It is an arithmetic number, because the mean of its divisors is an integer number (27900000).

Almost surely, 2^1284327198 is an apocalyptic number.

1284327198 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1284327198, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1785600000).

1284327198 is an abundant number, since it is smaller than the sum of its proper divisors (2286872802).

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

1284327198 is a wasteful number, since it uses less digits than its factorization.

1284327198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1147 (or 1141 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 1284327198 is about 35837.5110463883. The cubic root of 1284327198 is about 1086.9891936398.

The spelling of 1284327198 in words is "one billion, two hundred eighty-four million, three hundred twenty-seven thousand, one hundred ninety-eight".