204166494 has 160 divisors (see below), whose sum is σ = 551992320. Its totient is φ = 55194048.

The previous prime is 204166493. The next prime is 204166499. The reversal of 204166494 is 494661402.

204166494 is a `hidden beast` number, since 2 + 0 + 4 + 1 + 6 + 649 + 4 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204166493) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 2584347 + ... + 2584425.

It is an arithmetic number, because the mean of its divisors is an integer number (3449952).

Almost surely, 2^204166494 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 204166494, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (275996160).

204166494 is an abundant number, since it is smaller than the sum of its proper divisors (347825826).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

204166494 is a wasteful number, since it uses less digits than its factorization.

204166494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196 (or 187 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 204166494 is about 14288.6841241592. The cubic root of 204166494 is about 588.8366370130.

The spelling of 204166494 in words is "two hundred four million, one hundred sixty-six thousand, four hundred ninety-four".