202805930 has 8 divisors (see below), whose sum is σ = 365050692. Its totient is φ = 81122368.

The previous prime is 202805929. The next prime is 202805957. The reversal of 202805930 is 39508202.

It can be written as a sum of positive squares in 2 ways, for example, as 167676601 + 35129329 = 12949^2 + 5927^2 .

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

It is a super-2 number, since 2×202805930² = 82260490486329800, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 202805893 and 202805902.

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, 10140287 + ... + 10140306.

Almost surely, 2^202805930 is an apocalyptic number.

202805930 is a deficient number, since it is larger than the sum of its proper divisors (162244762).

202805930 is a wasteful number, since it uses less digits than its factorization.

202805930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20280600.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 202805930 is about 14240.9946984050. The cubic root of 202805930 is about 587.5257197130.

The spelling of 202805930 in words is "two hundred two million, eight hundred five thousand, nine hundred thirty".