1305249328 has 40 divisors (see below), whose sum is σ = 2549836800. Its totient is φ = 647252544.

The previous prime is 1305249293. The next prime is 1305249329. The reversal of 1305249328 is 8239425031.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1305249329) by changing a digit.

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, 1280403 + ... + 1281421.

It is an arithmetic number, because the mean of its divisors is an integer number (63745920).

Almost surely, 2^1305249328 is an apocalyptic number.

It is an amenable number.

1305249328 is a deficient number, since it is larger than the sum of its proper divisors (1244587472).

1305249328 is a wasteful number, since it uses less digits than its factorization.

1305249328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1609 (or 1603 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 1305249328 is about 36128.2344987961. The cubic root of 1305249328 is about 1092.8599049168.

The spelling of 1305249328 in words is "one billion, three hundred five million, two hundred forty-nine thousand, three hundred twenty-eight".