406531445 has 18 divisors (see below), whose sum is σ = 498732246. Its totient is φ = 318119760.

The previous prime is 406531423. The next prime is 406531457. The reversal of 406531445 is 544135604.

It can be written as a sum of positive squares in only one way, i.e., 325225156 + 81306289 = 18034^2 + 9017^2 .

It is not a de Polignac number, because 406531445 - 2⁶ = 406531381 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 3200972 + ... + 3201098.

It is an arithmetic number, because the mean of its divisors is an integer number (27707347).

Almost surely, 2^406531445 is an apocalyptic number.

It is an amenable number.

406531445 is a deficient number, since it is larger than the sum of its proper divisors (92200801).

406531445 is an frugal number, since it uses more digits than its factorization.

406531445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401 (or 203 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 32.

The square root of 406531445 is about 20162.6249531156. The cubic root of 406531445 is about 740.7950093554.

The spelling of 406531445 in words is "four hundred six million, five hundred thirty-one thousand, four hundred forty-five".