394609646 has 4 divisors (see below), whose sum is σ = 591914472. Its totient is φ = 197304822.

The previous prime is 394609577. The next prime is 394609679. The reversal of 394609646 is 646906493.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 394609646.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98652410 + ... + 98652413.

It is an arithmetic number, because the mean of its divisors is an integer number (147978618).

Almost surely, 2^394609646 is an apocalyptic number.

394609646 is a deficient number, since it is larger than the sum of its proper divisors (197304826).

394609646 is a wasteful number, since it uses less digits than its factorization.

394609646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197304825.

The product of its (nonzero) digits is 839808, while the sum is 47.

The square root of 394609646 is about 19864.7840662817. The cubic root of 394609646 is about 733.4816146892.

The spelling of 394609646 in words is "three hundred ninety-four million, six hundred nine thousand, six hundred forty-six".