1304220144 has 40 divisors (see below), whose sum is σ = 3567427920. Its totient is φ = 409166848.

The previous prime is 1304220133. The next prime is 1304220157. The reversal of 1304220144 is 4410224031.

It is a self number, because there is not a number n which added to its sum of digits gives 1304220144.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 798339 + ... + 799970.

It is an arithmetic number, because the mean of its divisors is an integer number (89185698).

Almost surely, 2^1304220144 is an apocalyptic number.

It is an amenable number.

1304220144 is an abundant number, since it is smaller than the sum of its proper divisors (2263207776).

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

1304220144 is a wasteful number, since it uses less digits than its factorization.

1304220144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1598337 (or 1598331 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 1304220144 is about 36113.9882040187. The cubic root of 1304220144 is about 1092.5725907986.

Adding to 1304220144 its reverse (4410224031), we get a palindrome (5714444175).

The spelling of 1304220144 in words is "one billion, three hundred four million, two hundred twenty thousand, one hundred forty-four".