406978676 has 12 divisors (see below), whose sum is σ = 766998372. Its totient is φ = 187836288.

The previous prime is 406978667. The next prime is 406978709. The reversal of 406978676 is 676879604.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 210250000 + 196728676 = 14500^2 + 14026^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3913205 + ... + 3913308.

It is an arithmetic number, because the mean of its divisors is an integer number (63916531).

Almost surely, 2^406978676 is an apocalyptic number.

It is an amenable number.

406978676 is a deficient number, since it is larger than the sum of its proper divisors (360019696).

406978676 is a wasteful number, since it uses less digits than its factorization.

406978676 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7826530 (or 7826528 counting only the distinct ones).

The product of its (nonzero) digits is 3048192, while the sum is 53.

The square root of 406978676 is about 20173.7124991906. The cubic root of 406978676 is about 741.0665628268.

The spelling of 406978676 in words is "four hundred six million, nine hundred seventy-eight thousand, six hundred seventy-six".