405418228 has 12 divisors (see below), whose sum is σ = 709841860. Its totient is φ = 202606272.

The previous prime is 405418207. The next prime is 405418259. The reversal of 405418228 is 822814504.

It can be written as a sum of positive squares in 2 ways, for example, as 135210384 + 270207844 = 11628^2 + 16438^2 .

It is a junction number, because it is equal to n+sod(n) for n = 405418193 and 405418202.

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, 16473 + ... + 32896.

Almost surely, 2^405418228 is an apocalyptic number.

It is an amenable number.

405418228 is a deficient number, since it is larger than the sum of its proper divisors (304423632).

405418228 is a wasteful number, since it uses less digits than its factorization.

405418228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51426 (or 51424 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 34.

The square root of 405418228 is about 20135.0000744971. Note that the first 4 decimals coincide. The cubic root of 405418228 is about 740.1182109669.

The spelling of 405418228 in words is "four hundred five million, four hundred eighteen thousand, two hundred twenty-eight".