202430172 has 36 divisors (see below), whose sum is σ = 549454920. Its totient is φ = 57837024.

The previous prime is 202430149. The next prime is 202430191. The reversal of 202430172 is 271034202.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 171547 + ... + 172722.

Almost surely, 2^202430172 is an apocalyptic number.

It is an amenable number.

202430172 is an abundant number, since it is smaller than the sum of its proper divisors (347024748).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

202430172 is a wasteful number, since it uses less digits than its factorization.

202430172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344290 (or 344281 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 202430172 is about 14227.7957533836. The cubic root of 202430172 is about 587.1626402975.

Adding to 202430172 its reverse (271034202), we get a palindrome (473464374).

The spelling of 202430172 in words is "two hundred two million, four hundred thirty thousand, one hundred seventy-two".