394069645 has 8 divisors (see below), whose sum is σ = 473073120. Its totient is φ = 315129360.

The previous prime is 394069631. The next prime is 394069693. The reversal of 394069645 is 546960493.

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

It is a de Polignac number, because none of the positive numbers 2^k-394069645 is a prime.

It is a super-3 number, since 3×394069645³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 394069595 and 394069604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 775 + ... + 28084.

It is an arithmetic number, because the mean of its divisors is an integer number (59134140).

Almost surely, 2^394069645 is an apocalyptic number.

It is an amenable number.

394069645 is a deficient number, since it is larger than the sum of its proper divisors (79003475).

394069645 is a wasteful number, since it uses less digits than its factorization.

394069645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31595.

The product of its (nonzero) digits is 699840, while the sum is 46.

The square root of 394069645 is about 19851.1874959661. The cubic root of 394069645 is about 733.1468859108.

The spelling of 394069645 in words is "three hundred ninety-four million, sixty-nine thousand, six hundred forty-five".