1205836668 has 18 divisors (see below), whose sum is σ = 3048087224. Its totient is φ = 401945544.

The previous prime is 1205836657. The next prime is 1205836669. The reversal of 1205836668 is 8666385021.

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1205836669) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16747696 + ... + 16747767.

Almost surely, 2^1205836668 is an apocalyptic number.

1205836668 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1205836668 is an abundant number, since it is smaller than the sum of its proper divisors (1842250556).

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

1205836668 is a wasteful number, since it uses less digits than its factorization.

1205836668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33495473 (or 33495468 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The square root of 1205836668 is about 34725.1590061154. The cubic root of 1205836668 is about 1064.3786681948.

The spelling of 1205836668 in words is "one billion, two hundred five million, eight hundred thirty-six thousand, six hundred sixty-eight".