406631817 has 12 divisors (see below), whose sum is σ = 588407664. Its totient is φ = 270603000.

The previous prime is 406631801. The next prime is 406631831. The reversal of 406631817 is 718136604.

406631817 is a `hidden beast` number, since 4 + 0 + 6 + 631 + 8 + 17 = 666.

It is not a de Polignac number, because 406631817 - 2⁴ = 406631801 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (406631117) 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, 35059 + ... + 45192.

It is an arithmetic number, because the mean of its divisors is an integer number (49033972).

Almost surely, 2^406631817 is an apocalyptic number.

It is an amenable number.

406631817 is a deficient number, since it is larger than the sum of its proper divisors (181775847).

406631817 is a wasteful number, since it uses less digits than its factorization.

406631817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80820 (or 80817 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 406631817 is about 20165.1138603282. The cubic root of 406631817 is about 740.8559713950.

The spelling of 406631817 in words is "four hundred six million, six hundred thirty-one thousand, eight hundred seventeen".