304378069 has 4 divisors (see below), whose sum is σ = 305417196. Its totient is φ = 303338944.

The previous prime is 304378051. The next prime is 304378079. The reversal of 304378069 is 960873403.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 210540100 + 93837969 = 14510^2 + 9687^2 .

It is a cyclic number.

It is not a de Polignac number, because 304378069 - 2²¹ = 302280917 is a prime.

It is a super-2 number, since 2×304378069² = 185292017776337522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (304378079) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 519124 + ... + 519709.

It is an arithmetic number, because the mean of its divisors is an integer number (76354299).

Almost surely, 2^304378069 is an apocalyptic number.

It is an amenable number.

304378069 is a deficient number, since it is larger than the sum of its proper divisors (1039127).

304378069 is a wasteful number, since it uses less digits than its factorization.

304378069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1039126.

The product of its (nonzero) digits is 108864, while the sum is 40.

The square root of 304378069 is about 17446.4342775250. The cubic root of 304378069 is about 672.6737068263.

The spelling of 304378069 in words is "three hundred four million, three hundred seventy-eight thousand, sixty-nine".