405238226 has 4 divisors (see below), whose sum is σ = 607857342. Its totient is φ = 202619112.

The previous prime is 405238217. The next prime is 405238241. The reversal of 405238226 is 622832504.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 256032001 + 149206225 = 16001^2 + 12215^2 .

It is a junction number, because it is equal to n+sod(n) for n = 405238192 and 405238201.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101309555 + ... + 101309558.

Almost surely, 2^405238226 is an apocalyptic number.

405238226 is a deficient number, since it is larger than the sum of its proper divisors (202619116).

405238226 is a wasteful number, since it uses less digits than its factorization.

405238226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202619115.

The product of its (nonzero) digits is 23040, while the sum is 32.

The square root of 405238226 is about 20130.5296999359. The cubic root of 405238226 is about 740.0086595042.

The spelling of 405238226 in words is "four hundred five million, two hundred thirty-eight thousand, two hundred twenty-six".