204152728406 has 8 divisors (see below), whose sum is σ = 334068101064. Its totient is φ = 92796694720.

The previous prime is 204152728333. The next prime is 204152728421. The reversal of 204152728406 is 604827251402.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×204152728406² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4639834715 + ... + 4639834758.

It is an arithmetic number, because the mean of its divisors is an integer number (41758512633).

Almost surely, 2^204152728406 is an apocalyptic number.

204152728406 is a deficient number, since it is larger than the sum of its proper divisors (129915372658).

204152728406 is a wasteful number, since it uses less digits than its factorization.

204152728406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9279669486.

The product of its (nonzero) digits is 215040, while the sum is 41.

Adding to 204152728406 its reverse (604827251402), we get a palindrome (808979979808).

The spelling of 204152728406 in words is "two hundred four billion, one hundred fifty-two million, seven hundred twenty-eight thousand, four hundred six".