409864946 has 16 divisors (see below), whose sum is σ = 651513240. Its totient is φ = 193038720.

The previous prime is 409864943. The next prime is 409864999. The reversal of 409864946 is 649468904.

It can be written as a sum of positive squares in 4 ways, for example, as 363093025 + 46771921 = 19055^2 + 6839^2 .

It is a junction number, because it is equal to n+sod(n) for n = 409864894 and 409864903.

It is not an unprimeable number, because it can be changed into a prime (409864943) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83801 + ... + 88556.

Almost surely, 2^409864946 is an apocalyptic number.

409864946 is a deficient number, since it is larger than the sum of its proper divisors (241648294).

409864946 is a wasteful number, since it uses less digits than its factorization.

409864946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172429.

The product of its (nonzero) digits is 1492992, while the sum is 50.

The square root of 409864946 is about 20245.1215358170. The cubic root of 409864946 is about 742.8143052186.

The spelling of 409864946 in words is "four hundred nine million, eight hundred sixty-four thousand, nine hundred forty-six".