406878813 has 48 divisors (see below), whose sum is σ = 665832960. Its totient is φ = 237196800.

The previous prime is 406878811. The next prime is 406878841. The reversal of 406878813 is 318878604.

It is not a de Polignac number, because 406878813 - 2¹ = 406878811 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406878811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 714793 + ... + 715361.

It is an arithmetic number, because the mean of its divisors is an integer number (13871520).

Almost surely, 2^406878813 is an apocalyptic number.

It is an amenable number.

406878813 is a deficient number, since it is larger than the sum of its proper divisors (258954147).

406878813 is a wasteful number, since it uses less digits than its factorization.

406878813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 850 (or 847 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 45.

The square root of 406878813 is about 20171.2372699346. The cubic root of 406878813 is about 741.0059444304.

The spelling of 406878813 in words is "four hundred six million, eight hundred seventy-eight thousand, eight hundred thirteen".