394487545 has 8 divisors (see below), whose sum is σ = 473606280. Its totient is φ = 315442560.

The previous prime is 394487531. The next prime is 394487563. The reversal of 394487545 is 545784493.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 28224 + 394459321 = 168^2 + 19861^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 394487545 - 2⁷ = 394487417 is a prime.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 5890 + ... + 28699.

It is an arithmetic number, because the mean of its divisors is an integer number (59200785).

Almost surely, 2^394487545 is an apocalyptic number.

It is an amenable number.

394487545 is a deficient number, since it is larger than the sum of its proper divisors (79118735).

394487545 is a wasteful number, since it uses less digits than its factorization.

394487545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36875.

The product of its digits is 2419200, while the sum is 49.

The square root of 394487545 is about 19861.7105255313. The cubic root of 394487545 is about 733.4059550441.

The spelling of 394487545 in words is "three hundred ninety-four million, four hundred eighty-seven thousand, five hundred forty-five".