204478172 has 12 divisors (see below), whose sum is σ = 359159136. Its totient is φ = 101861280.

The previous prime is 204478069. The next prime is 204478181. The reversal of 204478172 is 271874402.

It is a happy number.

It is a super-3 number, since 3×204478172³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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, 93233 + ... + 95400.

It is an arithmetic number, because the mean of its divisors is an integer number (29929928).

Almost surely, 2^204478172 is an apocalyptic number.

It is an amenable number.

204478172 is a deficient number, since it is larger than the sum of its proper divisors (154680964).

204478172 is a wasteful number, since it uses less digits than its factorization.

204478172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188908 (or 188906 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 35.

The square root of 204478172 is about 14299.5864275859. The cubic root of 204478172 is about 589.1361215345.

The spelling of 204478172 in words is "two hundred four million, four hundred seventy-eight thousand, one hundred seventy-two".