406906404 has 12 divisors (see below), whose sum is σ = 949448304. Its totient is φ = 135635464.

The previous prime is 406906397. The next prime is 406906439. The reversal of 406906404 is 404609604.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×406906404² = 331145643232422432, which contains 22 as substring.

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, 16954422 + ... + 16954445.

It is an arithmetic number, because the mean of its divisors is an integer number (79120692).

Almost surely, 2^406906404 is an apocalyptic number.

It is an amenable number.

406906404 is an abundant number, since it is smaller than the sum of its proper divisors (542541900).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

406906404 is a wasteful number, since it uses less digits than its factorization.

406906404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33908874 (or 33908872 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 406906404 is about 20171.9211777163. The cubic root of 406906404 is about 741.0226935887.

The spelling of 406906404 in words is "four hundred six million, nine hundred six thousand, four hundred four".