409487964 has 24 divisors (see below), whose sum is σ = 973501200. Its totient is φ = 133920384.

The previous prime is 409487941. The next prime is 409487971. The reversal of 409487964 is 469784904.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 321289 + ... + 322560.

It is an arithmetic number, because the mean of its divisors is an integer number (40562550).

Almost surely, 2^409487964 is an apocalyptic number.

It is an amenable number.

409487964 is an abundant number, since it is smaller than the sum of its proper divisors (564013236).

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

409487964 is a wasteful number, since it uses less digits than its factorization.

409487964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 643909 (or 643907 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 51.

The square root of 409487964 is about 20235.8089534370. The cubic root of 409487964 is about 742.5864956089.

The spelling of 409487964 in words is "four hundred nine million, four hundred eighty-seven thousand, nine hundred sixty-four".