304005402 has 12 divisors (see below), whose sum is σ = 658678410. Its totient is φ = 101335128.

The previous prime is 304005389. The next prime is 304005409. The reversal of 304005402 is 204500403.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 209351961 + 94653441 = 14469^2 + 9729^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 16889189 = 304005402 / (3 + 0 + 4 + 0 + 0 + 5 + 4 + 0 + 2).

It is not an unprimeable number, because it can be changed into a prime (304005409) 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, 8444577 + ... + 8444612.

Almost surely, 2^304005402 is an apocalyptic number.

304005402 is an abundant number, since it is smaller than the sum of its proper divisors (354673008).

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

304005402 is a wasteful number, since it uses less digits than its factorization.

304005402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16889197 (or 16889194 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 304005402 is about 17435.7506864488. The cubic root of 304005402 is about 672.3990640974.

Adding to 304005402 its reverse (204500403), we get a palindrome (508505805).

The spelling of 304005402 in words is "three hundred four million, five thousand, four hundred two".