1304240128 has 28 divisors (see below), whose sum is σ = 2608337430. Its totient is φ = 652115968.

The previous prime is 1304240111. The next prime is 1304240129. The reversal of 1304240128 is 8210424031.

It can be written as a sum of positive squares in only one way, i.e., 782209024 + 522031104 = 27968^2 + 22848^2 .

It is a super-2 number, since 2×1304240128² = 3402084622970912768, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1304240129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71413 + ... + 87796.

Almost surely, 2^1304240128 is an apocalyptic number.

It is an amenable number.

1304240128 is a deficient number, since it is larger than the sum of its proper divisors (1304097302).

1304240128 is an frugal number, since it uses more digits than its factorization.

1304240128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159235 (or 159211 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 1304240128 is about 36114.2648824533. The cubic root of 1304240128 is about 1092.5781711089.

Adding to 1304240128 its reverse (8210424031), we get a palindrome (9514664159).

The spelling of 1304240128 in words is "one billion, three hundred four million, two hundred forty thousand, one hundred twenty-eight".