204778006 has 4 divisors (see below), whose sum is σ = 307167012. Its totient is φ = 102389002.

The previous prime is 204778003. The next prime is 204778027. The reversal of 204778006 is 600877402.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204778003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51194500 + ... + 51194503.

It is an arithmetic number, because the mean of its divisors is an integer number (76791753).

Almost surely, 2^204778006 is an apocalyptic number.

204778006 is a deficient number, since it is larger than the sum of its proper divisors (102389006).

204778006 is a wasteful number, since it uses less digits than its factorization.

204778006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102389005.

The product of its (nonzero) digits is 18816, while the sum is 34.

The square root of 204778006 is about 14310.0665966305. The cubic root of 204778006 is about 589.4239383529.

The spelling of 204778006 in words is "two hundred four million, seven hundred seventy-eight thousand, six".