204774390 has 24 divisors (see below), whose sum is σ = 532413648. Its totient is φ = 54606480.

The previous prime is 204774379. The next prime is 204774421. The reversal of 204774390 is 93477402.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1137546 + ... + 1137725.

It is an arithmetic number, because the mean of its divisors is an integer number (22183902).

Almost surely, 2^204774390 is an apocalyptic number.

204774390 is an abundant number, since it is smaller than the sum of its proper divisors (327639258).

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

204774390 is a wasteful number, since it uses less digits than its factorization.

204774390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2275284 (or 2275281 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 36.

The square root of 204774390 is about 14309.9402514476. The cubic root of 204774390 is about 589.4204689544.

The spelling of 204774390 in words is "two hundred four million, seven hundred seventy-four thousand, three hundred ninety".