1304945280 has 96 divisors (see below), whose sum is σ = 4506159060. Its totient is φ = 347983872.

The previous prime is 1304945261. The next prime is 1304945293. The reversal of 1304945280 is 825494031.

It can be written as a sum of positive squares in 2 ways, for example, as 1283932224 + 21013056 = 35832^2 + 4584^2 .

It is a tau number, because it is divible by the number of its divisors (96).

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 11 ways as a sum of consecutive naturals, for example, 107517 + ... + 119036.

Almost surely, 2^1304945280 is an apocalyptic number.

1304945280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1304945280 is an abundant number, since it is smaller than the sum of its proper divisors (3201213780).

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

1304945280 is a wasteful number, since it uses less digits than its factorization.

1304945280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226578 (or 226563 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 1304945280 is about 36124.0263536611. The cubic root of 1304945280 is about 1092.7750404991.

The spelling of 1304945280 in words is "one billion, three hundred four million, nine hundred forty-five thousand, two hundred eighty".