406572813 has 12 divisors (see below), whose sum is σ = 588019068. Its totient is φ = 270703680.

The previous prime is 406572797. The next prime is 406572821. The reversal of 406572813 is 318275604.

406572813 is a `hidden beast` number, since 4 + 0 + 6 + 572 + 81 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 200420649 + 206152164 = 14157^2 + 14358^2 .

It is not a de Polignac number, because 406572813 - 2⁴ = 406572797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406572823) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21168 + ... + 35513.

It is an arithmetic number, because the mean of its divisors is an integer number (49001589).

Almost surely, 2^406572813 is an apocalyptic number.

It is an amenable number.

406572813 is a deficient number, since it is larger than the sum of its proper divisors (181446255).

406572813 is a wasteful number, since it uses less digits than its factorization.

406572813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57484 (or 57481 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 406572813 is about 20163.6507855100. The cubic root of 406572813 is about 740.8201358812.

The spelling of 406572813 in words is "four hundred six million, five hundred seventy-two thousand, eight hundred thirteen".