406909072 has 10 divisors (see below), whose sum is σ = 788386358. Its totient is φ = 203454528.

The previous prime is 406909067. The next prime is 406909079. The reversal of 406909072 is 270909604.

It can be written as a sum of positive squares in only one way, i.e., 398241936 + 8667136 = 19956^2 + 2944^2 .

It is not an unprimeable number, because it can be changed into a prime (406909079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12715893 + ... + 12715924.

Almost surely, 2^406909072 is an apocalyptic number.

It is an amenable number.

406909072 is a deficient number, since it is larger than the sum of its proper divisors (381477286).

406909072 is a wasteful number, since it uses less digits than its factorization.

406909072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25431825 (or 25431819 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 406909072 is about 20171.9873091374. The cubic root of 406909072 is about 741.0243131620.

The spelling of 406909072 in words is "four hundred six million, nine hundred nine thousand, seventy-two".