394212445 has 16 divisors (see below), whose sum is σ = 520132608. Its totient is φ = 284437440.

The previous prime is 394212443. The next prime is 394212451. The reversal of 394212445 is 544212493.

It is not a de Polignac number, because 394212445 - 2¹ = 394212443 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 394212445.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394212443) 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 15 ways as a sum of consecutive naturals, for example, 21234 + ... + 35203.

It is an arithmetic number, because the mean of its divisors is an integer number (32508288).

Almost surely, 2^394212445 is an apocalyptic number.

It is an amenable number.

394212445 is a deficient number, since it is larger than the sum of its proper divisors (125920163).

394212445 is a wasteful number, since it uses less digits than its factorization.

394212445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56580.

The product of its digits is 34560, while the sum is 34.

The square root of 394212445 is about 19854.7839323424. The cubic root of 394212445 is about 733.2354326378.

The spelling of 394212445 in words is "three hundred ninety-four million, two hundred twelve thousand, four hundred forty-five".