406649505 has 16 divisors (see below), whose sum is σ = 654050304. Its totient is φ = 215742720.

The previous prime is 406649489. The next prime is 406649519. The reversal of 406649505 is 505946604.

It is not a de Polignac number, because 406649505 - 2⁴ = 406649489 is a prime.

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, 68104 + ... + 73833.

It is an arithmetic number, because the mean of its divisors is an integer number (40878144).

Almost surely, 2^406649505 is an apocalyptic number.

It is an amenable number.

406649505 is a deficient number, since it is larger than the sum of its proper divisors (247400799).

406649505 is a wasteful number, since it uses less digits than its factorization.

406649505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142136.

The product of its (nonzero) digits is 129600, while the sum is 39.

The square root of 406649505 is about 20165.5524347834. The cubic root of 406649505 is about 740.8667133568.

The spelling of 406649505 in words is "four hundred six million, six hundred forty-nine thousand, five hundred five".