408664446 has 8 divisors (see below), whose sum is σ = 817328904. Its totient is φ = 136221480.

The previous prime is 408664429. The next prime is 408664453. The reversal of 408664446 is 644466804.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

408664446 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 408664398 and 408664407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34055365 + ... + 34055376.

It is an arithmetic number, because the mean of its divisors is an integer number (102166113).

Almost surely, 2^408664446 is an apocalyptic number.

408664446 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

408664446 is a wasteful number, since it uses less digits than its factorization.

408664446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68110746.

The product of its (nonzero) digits is 442368, while the sum is 42.

The square root of 408664446 is about 20215.4506751643. The cubic root of 408664446 is about 742.0883582536.

The spelling of 408664446 in words is "four hundred eight million, six hundred sixty-four thousand, four hundred forty-six".