406881730 has 32 divisors (see below), whose sum is σ = 765967104. Its totient is φ = 155322816.

The previous prime is 406881701. The next prime is 406881743. The reversal of 406881730 is 37188604.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 406881730.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 113932 + ... + 117448.

It is an arithmetic number, because the mean of its divisors is an integer number (23936472).

Almost surely, 2^406881730 is an apocalyptic number.

406881730 is a deficient number, since it is larger than the sum of its proper divisors (359085374).

406881730 is a wasteful number, since it uses less digits than its factorization.

406881730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4050.

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 406881730 is about 20171.3095757316. The cubic root of 406881730 is about 741.0077152355.

The spelling of 406881730 in words is "four hundred six million, eight hundred eighty-one thousand, seven hundred thirty".