406640122 has 12 divisors (see below), whose sum is σ = 709545690. Its totient is φ = 174274296.

The previous prime is 406640093. The next prime is 406640137. The reversal of 406640122 is 221046604.

It can be written as a sum of positive squares in only one way, i.e., 355360201 + 51279921 = 18851^2 + 7161^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2074597 + ... + 2074792.

Almost surely, 2^406640122 is an apocalyptic number.

406640122 is a deficient number, since it is larger than the sum of its proper divisors (302905568).

406640122 is a wasteful number, since it uses less digits than its factorization.

406640122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4149405 (or 4149398 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 406640122 is about 20165.3197842236. The cubic root of 406640122 is about 740.8610150788.

Adding to 406640122 its reverse (221046604), we get a palindrome (627686726).

The spelling of 406640122 in words is "four hundred six million, six hundred forty thousand, one hundred twenty-two".