1285853198 has 24 divisors (see below), whose sum is σ = 2281721400. Its totient is φ = 541737168.

The previous prime is 1285853197. The next prime is 1285853207. The reversal of 1285853198 is 8913585821.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1285853197) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 105413 + ... + 116976.

It is an arithmetic number, because the mean of its divisors is an integer number (95071725).

Almost surely, 2^1285853198 is an apocalyptic number.

1285853198 is a deficient number, since it is larger than the sum of its proper divisors (995868202).

1285853198 is a wasteful number, since it uses less digits than its factorization.

1285853198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222464 (or 222457 counting only the distinct ones).

The product of its digits is 691200, while the sum is 50.

The square root of 1285853198 is about 35858.7952669913. The cubic root of 1285853198 is about 1087.4195328316.

The spelling of 1285853198 in words is "one billion, two hundred eighty-five million, eight hundred fifty-three thousand, one hundred ninety-eight".