1305880812 has 96 divisors (see below), whose sum is σ = 3499070400. Its totient is φ = 420857856.

The previous prime is 1305880801. The next prime is 1305880831. The reversal of 1305880812 is 2180885031.

1305880812 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 690364 + ... + 692252.

It is an arithmetic number, because the mean of its divisors is an integer number (36448650).

Almost surely, 2^1305880812 is an apocalyptic number.

1305880812 is a gapful number since it is divisible by the number (12) 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 1305880812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1749535200).

1305880812 is an abundant number, since it is smaller than the sum of its proper divisors (2193189588).

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

1305880812 is a wasteful number, since it uses less digits than its factorization.

1305880812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2112 (or 2104 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 36.

The square root of 1305880812 is about 36136.9729224793. The cubic root of 1305880812 is about 1093.0361195972.

The spelling of 1305880812 in words is "one billion, three hundred five million, eight hundred eighty thousand, eight hundred twelve".