395047989 has 32 divisors (see below), whose sum is σ = 708215040. Its totient is φ = 212461056.

The previous prime is 395047987. The next prime is 395047993. The reversal of 395047989 is 989740593.

395047989 is a `hidden beast` number, since 3 + 95 + 0 + 479 + 89 = 666.

It is not a de Polignac number, because 395047989 - 2¹ = 395047987 is a prime.

It is a super-2 number, since 2×395047989² = 312125827225888242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (395047987) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 58264 + ... + 64689.

It is an arithmetic number, because the mean of its divisors is an integer number (22131720).

Almost surely, 2^395047989 is an apocalyptic number.

It is an amenable number.

395047989 is a deficient number, since it is larger than the sum of its proper divisors (313167051).

395047989 is a wasteful number, since it uses less digits than its factorization.

395047989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122986 (or 122980 counting only the distinct ones).

The product of its (nonzero) digits is 2449440, while the sum is 54.

The square root of 395047989 is about 19875.8141720031. The cubic root of 395047989 is about 733.7531045513.

The spelling of 395047989 in words is "three hundred ninety-five million, forty-seven thousand, nine hundred eighty-nine".