406445506 has 4 divisors (see below), whose sum is σ = 609668262. Its totient is φ = 203222752.

The previous prime is 406445497. The next prime is 406445521. The reversal of 406445506 is 605544604.

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., 228463225 + 177982281 = 15115^2 + 13341^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101611375 + ... + 101611378.

Almost surely, 2^406445506 is an apocalyptic number.

406445506 is a deficient number, since it is larger than the sum of its proper divisors (203222756).

406445506 is a wasteful number, since it uses less digits than its factorization.

406445506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203222755.

The product of its (nonzero) digits is 57600, while the sum is 34.

The square root of 406445506 is about 20160.4936943518. The cubic root of 406445506 is about 740.7428053831.

The spelling of 406445506 in words is "four hundred six million, four hundred forty-five thousand, five hundred six".