204439970 has 16 divisors (see below), whose sum is σ = 420562368. Its totient is φ = 70093680.

The previous prime is 204439967. The next prime is 204439973. The reversal of 204439970 is 79934402.

It is an interprime number because it is at equal distance from previous prime (204439967) and next prime (204439973).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (204439973) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1460216 + ... + 1460355.

It is an arithmetic number, because the mean of its divisors is an integer number (26285148).

Almost surely, 2^204439970 is an apocalyptic number.

204439970 is an abundant number, since it is smaller than the sum of its proper divisors (216122398).

204439970 is a wasteful number, since it uses less digits than its factorization.

204439970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2920585.

The product of its (nonzero) digits is 54432, while the sum is 38.

The square root of 204439970 is about 14298.2505922928. The cubic root of 204439970 is about 589.0994304464.

Adding to 204439970 its product of nonzero digits (54432), we get a palindrome (204494402).

The spelling of 204439970 in words is "two hundred four million, four hundred thirty-nine thousand, nine hundred seventy".