394490070645 has 32 divisors (see below), whose sum is σ = 688932653184. Its totient is φ = 191165644800.

The previous prime is 394490070631. The next prime is 394490070647. The reversal of 394490070645 is 546070094493.

It is a happy number.

It is not a de Polignac number, because 394490070645 - 2⁶ = 394490070581 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394490070647) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 329196 + ... + 947285.

It is an arithmetic number, because the mean of its divisors is an integer number (21529145412).

Almost surely, 2^394490070645 is an apocalyptic number.

It is an amenable number.

394490070645 is a deficient number, since it is larger than the sum of its proper divisors (294442582539).

394490070645 is a wasteful number, since it uses less digits than its factorization.

394490070645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1278373.

The product of its (nonzero) digits is 3265920, while the sum is 51.

The spelling of 394490070645 in words is "three hundred ninety-four billion, four hundred ninety million, seventy thousand, six hundred forty-five".