204939394 has 32 divisors (see below), whose sum is σ = 340889472. Its totient is φ = 92395600.

The previous prime is 204939389. The next prime is 204939401. The reversal of 204939394 is 493939402.

It is a self number, because there is not a number n which added to its sum of digits gives 204939394.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 444324 + ... + 444784.

It is an arithmetic number, because the mean of its divisors is an integer number (10652796).

Almost surely, 2^204939394 is an apocalyptic number.

204939394 is a deficient number, since it is larger than the sum of its proper divisors (135950078).

204939394 is a wasteful number, since it uses less digits than its factorization.

204939394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 663 (or 641 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 43.

The square root of 204939394 is about 14315.7044535014. The cubic root of 204939394 is about 589.5787417152.

The spelling of 204939394 in words is "two hundred four million, nine hundred thirty-nine thousand, three hundred ninety-four".