1305305428 has 24 divisors (see below), whose sum is σ = 2700633600. Its totient is φ = 540126048.

The previous prime is 1305305423. The next prime is 1305305447. The reversal of 1305305428 is 8245035031.

It is a self number, because there is not a number n which added to its sum of digits gives 1305305428.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1305305423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 802948 + ... + 804571.

It is an arithmetic number, because the mean of its divisors is an integer number (112526400).

Almost surely, 2^1305305428 is an apocalyptic number.

It is an amenable number.

1305305428 is an abundant number, since it is smaller than the sum of its proper divisors (1395328172).

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

1305305428 is a wasteful number, since it uses less digits than its factorization.

1305305428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1607559 (or 1607557 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 1305305428 is about 36129.0108915259. The cubic root of 1305305428 is about 1092.8755618392.

The spelling of 1305305428 in words is "one billion, three hundred five million, three hundred five thousand, four hundred twenty-eight".