408268646 has 16 divisors (see below), whose sum is σ = 625027104. Its totient is φ = 199939584.

The previous prime is 408268639. The next prime is 408268657. The reversal of 408268646 is 646862804.

It is a junction number, because it is equal to n+sod(n) for n = 408268597 and 408268606.

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, 65606 + ... + 71558.

It is an arithmetic number, because the mean of its divisors is an integer number (39064194).

Almost surely, 2^408268646 is an apocalyptic number.

408268646 is a deficient number, since it is larger than the sum of its proper divisors (216758458).

408268646 is a wasteful number, since it uses less digits than its factorization.

408268646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6655.

The product of its (nonzero) digits is 442368, while the sum is 44.

The square root of 408268646 is about 20205.6587618419. The cubic root of 408268646 is about 741.8487048735.

The spelling of 408268646 in words is "four hundred eight million, two hundred sixty-eight thousand, six hundred forty-six".