204861428 has 6 divisors (see below), whose sum is σ = 358507506. Its totient is φ = 102430712.

The previous prime is 204861421. The next prime is 204861463. The reversal of 204861428 is 824168402.

It can be written as a sum of positive squares in only one way, i.e., 146216464 + 58644964 = 12092^2 + 7658^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204861421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25607675 + ... + 25607682.

It is an arithmetic number, because the mean of its divisors is an integer number (59751251).

Almost surely, 2^204861428 is an apocalyptic number.

It is an amenable number.

204861428 is a deficient number, since it is larger than the sum of its proper divisors (153646078).

204861428 is a wasteful number, since it uses less digits than its factorization.

204861428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51215361 (or 51215359 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 35.

The square root of 204861428 is about 14312.9811010844. The cubic root of 204861428 is about 589.5039668827.

The spelling of 204861428 in words is "two hundred four million, eight hundred sixty-one thousand, four hundred twenty-eight".