405445204 has 12 divisors (see below), whose sum is σ = 711112500. Its totient is φ = 202270208.

The previous prime is 405445193. The next prime is 405445217. The reversal of 405445204 is 402544504.

It can be written as a sum of positive squares in 2 ways, for example, as 270931600 + 134513604 = 16460^2 + 11598^2 .

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, 111079 + ... + 114670.

It is an arithmetic number, because the mean of its divisors is an integer number (59259375).

Almost surely, 2^405445204 is an apocalyptic number.

It is an amenable number.

405445204 is a deficient number, since it is larger than the sum of its proper divisors (305667296).

405445204 is a wasteful number, since it uses less digits than its factorization.

405445204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226202 (or 226200 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 28.

The square root of 405445204 is about 20135.6699416732. The cubic root of 405445204 is about 740.1346261029.

Adding to 405445204 its reverse (402544504), we get a palindrome (807989708).

The spelling of 405445204 in words is "four hundred five million, four hundred forty-five thousand, two hundred four".