409491468 has 18 divisors (see below), whose sum is σ = 1035103524. Its totient is φ = 136497144.

The previous prime is 409491419. The next prime is 409491479. The reversal of 409491468 is 864194904.

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5687346 + ... + 5687417.

Almost surely, 2^409491468 is an apocalyptic number.

It is an amenable number.

409491468 is an abundant number, since it is smaller than the sum of its proper divisors (625612056).

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

409491468 is a wasteful number, since it uses less digits than its factorization.

409491468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11374773 (or 11374768 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 409491468 is about 20235.8955324443. The cubic root of 409491468 is about 742.5886137140.

The spelling of 409491468 in words is "four hundred nine million, four hundred ninety-one thousand, four hundred sixty-eight".