1205956680 has 32 divisors (see below), whose sum is σ = 3617870400. Its totient is φ = 321588416.

The previous prime is 1205956669. The next prime is 1205956709. The reversal of 1205956680 is 866595021.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5024700 + ... + 5024939.

It is an arithmetic number, because the mean of its divisors is an integer number (113058450).

Almost surely, 2^1205956680 is an apocalyptic number.

1205956680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1205956680 is an abundant number, since it is smaller than the sum of its proper divisors (2411913720).

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

1205956680 is a wasteful number, since it uses less digits than its factorization.

1205956680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10049653 (or 10049649 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 42.

The square root of 1205956680 is about 34726.8869897663. The cubic root of 1205956680 is about 1064.4139781111.

The spelling of 1205956680 in words is "one billion, two hundred five million, nine hundred fifty-six thousand, six hundred eighty".