304395987 has 18 divisors (see below), whose sum is σ = 472452708. Its totient is φ = 173819688.

The previous prime is 304395967. The next prime is 304395997. The reversal of 304395987 is 789593403.

It is not a de Polignac number, because 304395987 - 2⁷ = 304395859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (304395947) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 210814 + ... + 212252.

Almost surely, 2^304395987 is an apocalyptic number.

304395987 is a deficient number, since it is larger than the sum of its proper divisors (168056721).

304395987 is an frugal number, since it uses more digits than its factorization.

304395987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2895 (or 1449 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 48.

The square root of 304395987 is about 17446.9477846413. The cubic root of 304395987 is about 672.6869061248.

Multiplying 304395987 by its sum of digits (48), we get a square (14611007376 = 120876²).

The spelling of 304395987 in words is "three hundred four million, three hundred ninety-five thousand, nine hundred eighty-seven".