204394390 has 8 divisors (see below), whose sum is σ = 367909920. Its totient is φ = 81757752.

The previous prime is 204394373. The next prime is 204394403. The reversal of 204394390 is 93493402.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10219710 + ... + 10219729.

It is an arithmetic number, because the mean of its divisors is an integer number (45988740).

Almost surely, 2^204394390 is an apocalyptic number.

204394390 is a deficient number, since it is larger than the sum of its proper divisors (163515530).

204394390 is a wasteful number, since it uses less digits than its factorization.

204394390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20439446.

The product of its (nonzero) digits is 23328, while the sum is 34.

The square root of 204394390 is about 14296.6566021570. The cubic root of 204394390 is about 589.0556471820.

The spelling of 204394390 in words is "two hundred four million, three hundred ninety-four thousand, three hundred ninety".