394249487 has 8 divisors (see below), whose sum is σ = 415350000. Its totient is φ = 373184064.

The previous prime is 394249483. The next prime is 394249523. The reversal of 394249487 is 784942493.

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

It is a cyclic number.

It is not a de Polignac number, because 394249487 - 2² = 394249483 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394249483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16139 + ... + 32387.

It is an arithmetic number, because the mean of its divisors is an integer number (51918750).

Almost surely, 2^394249487 is an apocalyptic number.

394249487 is a deficient number, since it is larger than the sum of its proper divisors (21100513).

394249487 is a wasteful number, since it uses less digits than its factorization.

394249487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17545.

The product of its digits is 1741824, while the sum is 50.

The square root of 394249487 is about 19855.7167334750. The cubic root of 394249487 is about 733.2583979674.

The spelling of 394249487 in words is "three hundred ninety-four million, two hundred forty-nine thousand, four hundred eighty-seven".