1304165628 has 18 divisors (see below), whose sum is σ = 3296640984. Its totient is φ = 434721864.

The previous prime is 1304165627. The next prime is 1304165633. The reversal of 1304165628 is 8265614031.

It is a happy number.

1304165628 is a `hidden beast` number, since 13 + 0 + 4 + 16 + 5 + 628 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 36226823 = 1304165628 / (1 + 3 + 0 + 4 + 1 + 6 + 5 + 6 + 2 + 8).

It is a junction number, because it is equal to n+sod(n) for n = 1304165592 and 1304165601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1304165627) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18113376 + ... + 18113447.

Almost surely, 2^1304165628 is an apocalyptic number.

1304165628 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1304165628 is an abundant number, since it is smaller than the sum of its proper divisors (1992475356).

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

1304165628 is a wasteful number, since it uses less digits than its factorization.

1304165628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36226833 (or 36226828 counting only the distinct ones).

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

The square root of 1304165628 is about 36113.2334193437. The cubic root of 1304165628 is about 1092.5573675206.

Adding to 1304165628 its reverse (8265614031), we get a palindrome (9569779659).

The spelling of 1304165628 in words is "one billion, three hundred four million, one hundred sixty-five thousand, six hundred twenty-eight".