1205318680 has 64 divisors (see below), whose sum is σ = 2846612160. Its totient is φ = 458439168.

The previous prime is 1205318671. The next prime is 1205318689. The reversal of 1205318680 is 868135021.

It is an interprime number because it is at equal distance from previous prime (1205318671) and next prime (1205318689).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1205318689) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 155374 + ... + 162946.

It is an arithmetic number, because the mean of its divisors is an integer number (44478315).

Almost surely, 2^1205318680 is an apocalyptic number.

1205318680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1205318680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1423306080).

1205318680 is an abundant number, since it is smaller than the sum of its proper divisors (1641293480).

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

1205318680 is a wasteful number, since it uses less digits than its factorization.

1205318680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7780 (or 7776 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 1205318680 is about 34717.6998085991. The cubic root of 1205318680 is about 1064.2262389435.

The spelling of 1205318680 in words is "one billion, two hundred five million, three hundred eighteen thousand, six hundred eighty".